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Simple ABAP/4 for trouble shooting. May 25th, 2004. Objectives:. Understand and get an idea on what ABAP/4 programming does, and what is the component in ABAP workbench Get to know common statement, understand the ABAP program logic roughly.

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Objectives:

  • Understand and get an idea on what ABAP/4 programming does, and what is the component in ABAP workbench

  • Get to know common statement, understand the ABAP program logic roughly.

  • Able to do the basic investigation when facing the problem.


Content

  • Introduction R/3 Basis system overview

  • ABAP/4 overview

    • Component, Program, ABAP dictionary, Function Module , Message/Transaction code, etc.

  • Common Statement / Command

    • - Main event in ABAP program

    • - General ABAP command

  • Transportation for ABAP objects

  • Type of problem and how to investigate

    • Program bug, ABAP runtime error, Update terminate, Unexpected error message.


R/3

Application 1

R/3

Application N

...

Introduction R/3 Basis system overview

R/3 user

R/3 user

R/3 user

Presentation component

ABAP

Workbench

R/3 Basis

system

Kernel & Basis services

Database Management System

Database


Content

  • Introduction R/3 Basis system overview

  • ABAP/4 overview

    • Component, Program, ABAP dictionary, Function Module , Message/Transaction code, etc.

  • Common Statement / Command

    • - Main event in ABAP program

    • - General ABAP command

  • Transportation for ABAP objects

  • Type of problem and how to investigate

    • Program bug, ABAP runtime error, Update terminate, Unexpected error message.


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


Often used transactions

  • SE80 - Repository Browser: Used to display and edit hierarchical lists of development objects.

  • SE11 - Dictionary : Used to define and save data definitions You can also store documentation, help information, data relationships, and other information. You also use the Dictionary to generate database objects like tables and indexes.

  • The Dictionary is a central storage area for system-wide data definitions. Because definitions are stored centrally, they are available for use anywhere in any program throughout the system

  • SE38 - ABAP editor : Create/edit/Display program code

  • SE37 - Function Builder : define and store function modules, use the library to write new modules and look up information on existing modules


Often used transactions (con’t)

  • SE51 - Screen Painter : Used to design the screens in an application's graphical user interface.

  • SE41 - Menu Painter : Used to design the menus that appear in your interface

  • SE16 - Data browser : Display data in Transparent table or Database view

  • SM30 - Table maintenance : Maintain data


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


What is ABAP/4 program?

ABAP/4 : Advance Business Application Programming

Type of ABAP/4 program

1 Executable program(Report/Interface)

Can be started with transaction code/directly/background

(via SE38 or SA38 - For example: RMCB0100 )

I INCLUDE program

Can not run on its own, has been included in other program

M Module pool

Processing step of screens, can be executed via transaction code or Menu function (For example: SAPMV45A - Sale order processing)

F Function group

Contain function modules (SE37)

S Subroutine pool

Externally-called subroutines


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


F4

ABAP Dictionary

SE11 - Data dictionary

View

Table

Structure

Data element

ABAP Dictionary

Domain

Lock object

Search help


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


Function module

Function Module

- ABAP/4 program: Include program

- Special external subroutines (include) stored in a central library

- Different from normal ABAP routine is the clearly defined interface

for passing data to and from the function module. The calling program

and the called function module have separate work areas

- Located in Function group (main program start with SAPLxxxx)

- Can be tested separately in SE37

- Statement in ABAP to call function module are:

- CALL FUNCTION ‘xxxxx’


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


Message

There are several different types of message:

W - Warning (Correction possible)

E - Error (Correction required)

S - Success (message on next screen)

I - Information (press Enter to continue)

A - Abend (Transaction terminated)

X - Exit (Terminated with short dump)

Note : Transaction code for message maintenance is SE91,

Table store the message text is T100, language dependent.

ABAP key word - MESSAGE


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


Transaction code

Transaction code is:

Sequence of alphanumeric characters forming a code for business task.

Transaction type:

Dialog transaction - Flow by sequence of screens (for example FB03)

Report transaction - Start program with type 1(for example MCBA)

Variant transaction - (client specific) start another transaction with variant (for example UPAR)

Area menu - Menu which contain thegroup of frequently-used transactions (for example S001)

Parameter transaction - pre-assign values in the initial screen and suppress the screen when transaction is executed (for example OB22)

Note : All transactions are stored in table TSTC, Maintain via SE93


ABAP/4 overview

Topics:

  • Often used transactions

  • What is ABAP/4 program?

  • ABAP dictionary

  • Function Module

  • Message

  • Transaction code

  • Authorization in ABAP object


Authorization in ABAP object

  • Program authorization

  • Transaction code

  • Table maintenance/Data browser


Program authorization group

  • Authorization group is field of the authorization objects S_DEVELOP (program development and program execution) and S_PROGRAM (program maintenance).

  • This field contains the name of a program group that allows users to

  • execute programs

  • schedule jobs for background processing

  • maintain programs

  • maintain variants

  • When creating a program, you can specify an authorization group as one of the program attributes. This allows you to group together programs for the purposes of authorization checking.


Transaction authorization group

Authorization object in transaction code will be checked whenever the transaction is started. The following object will be checked

S_TCODE(Authorization check for transaction start )

The authorization checks defined by the developer with transaction SE93 (transaction maintenance) or in the ABAP/4 source code continue to be performed.

Field to be checked is TCD: Transaction code


Table maintenance/Data browser

Authorizations for displaying or maintaining tables. The object only

controls access using the standard table maintenance tool (SM31), enhanced table maintenance (SM30) or the Data Browser (SE16), including access in Customizing.

Object S_TABU_DIS -Table Maintenance (via standard tools such as SM31) will be checked for the following fields:

Authorization group for DD objects: Authorization for tables by

authorization class according to table TDDAT. (Using SM31 to display the authorization group table)

Activity: Allowed operations.

Possible values are:

- 02: Create, change or delete (Maintain) table entries

- 03: Display table entries only


Content

  • Introduction R/3 Basis system overview

  • ABAP/4 overview

    • Component, Program, ABAP dictionary, Function Module , Message/Transaction code, etc.

  • Common Statement / Command

    • - Main event in ABAP program

    • - General ABAP command

  • Transportation for ABAP objects

  • Type of problem and how to investigate

    • Program bug, ABAP runtime error, Update terminate, Unexpected error message.


Common Statement / Command

Topics:

  • Event in ABAP/4 program

    • - Dialog module

    • - Executable program (Selection screen, lists)

  • ABAP statement and Keyword


Event in ABAP/4 program

Event in Dialog Module

PBO Module.

Module xxxx

Module yyyy

PAI Module

Module aaaa

Module bbbb

100

PBO Module.

Module xxxx

Module yyyy

PAI Module

Module aaaa

Module bbbb

Transaction code has been requested from R/3 user

200

PBO Module.

Module xxxx

Module yyyy

PAI Module

Module aaaa

Module bbbb

300

Dialog screen chain

Module pool

PBO = Process Before Output

PAI = Process After Input



Common Statement / Command

Topics:

  • Event in ABAP/4 program

    • - Dialog module

    • - Executable program (Selection screen, lists)

  • ABAP statement and Keyword


ABAP statement and Keyword

Statement

The ABAP programming language consists of the following element types: STATEMENT, KEYWORD, COMMENT.

An ABAP program consists of individual ABAP statements. Each statement begins with a keyword and ends with a period. There might be comment in the same line as a statement

For example:

PROGRAM ZTEST.

WRITE ‘Hello world’.

In this case program ZTEST will generate the list consist of line ‘Hello world’.


ABAP statement and Keyword(con’t)

  • Keywords

  • Declarative keywords : define data types or declare the data objects

  • Modularization keywords : define processing blocks in an ABAP program

    • Event keyword :The respective processing blocks are processed as soon as a particular event occurs

    • Define keyword: define processing blocks that are processed as soon as they are called by an explicit statement in an ABAP program or in a screen flow logic

  • Control keywords: control the flow of an ABAP program according to certain conditions

  • Calling keywords: call processing blocks (defined by modularization keywords) in the same or other ABAP programs or branch completely to other ABAP programs

  • Expression and Operation keywords: Process the data


address OCCURS 0

Internal table

ABAP statement and Keyword(con’t)

Declarative keywords

TYPES create user-defined elementary data types and structured data types

Example TYPES:surname(20) TYPE C.

DATA define local/global variable for structure/internal table/memory block

Example DATA: BEGIN OF address,

address_number(10) TYPE C,

street(30),

country LIKE T001-LAND1,

END OF address.

TABLES create a data object called a table work area refer to ABAP dictionary(tables, structure,view)

Example TABLES: KNA1, KNB1.

CONSTANTS declare it as a fixed value variable

Example CONSTANTS: name(10) VALUE ‘Exxon Mobil’

structure


ABAP statement and Keyword(con’t)

Modularization keywords

Event define keywords

INITIALIZATIONBefore selection screen is displayed

AT SELECTION-SCREENAfter input selection screen + selection screen is active

START-OF-SELECTIONAfter process selection screen

GET <table> when logical DB offer a line of database table

END-OF-SELECTIONAfter all selection has been done

TOP-OF-PAGEProcess when new page is started

END-OF-PAGE Process when page is ended

AT LINE-SELECTIONWhen user select line in the list

AT USER-COMMANDWhen user press function key/enter command in command field


ABAP statement and Keyword(con’t)

Modularization keywords (con’t)

Process define key word for statement block

FORM...ENDFORMDefine subroutine

FUNCTION...ENDFUNCTION

Define Function module

MODULE...ENDMODULE

After process selection screen


ABAP statement and Keyword(con’t)

Built in function

Arithmetic & string function

ABS Amount (absolute value) x von x

SIGN Sign of x;

SIGN( x ) = 1 if x > 0

SIGN( x ) = 0 if x = 0

SIGN( x ) = -1 if x < 0

CEIL Smallest integer value that is not less than x

FLOOR Largest integer value that is not greater than x

TRUNC Interger part of x

FRAC Decimal part of x

STRLEN String length


ABAP statement and Keyword(con’t)

  • SELECT statements

  • SAP tables vs. Internal Tables

  • LOOP-ENDLOOP

  • WRITE statements

  • Comment in ABAP

  • Expressions and Operations in ABAP

  • Subroutines: FORMS, FUNCTION MODULE


ABAP statement and Keyword(con’t)

SELECT statement

  • to read table entries (records) from a table (database)

  • the return code is stored in system field SY-SUBRC

    • 0: if one or more table entries were retrieved

    • 4: if no table entries were retrieved (table is empty/ no data match the criteria)


SELECT * FROM <dbtab>

Additions

. . . WHERE <condition>

. . . ORDER BY PRIMARY KEY

. . . ORDER BY <f1> <f2> . . . <fn>

ABAP statement and Keyword(con’t)

SELECT statement


SELECT <f1> . . . <fn> INTO (<h1> . . . <hn>)

FROM <dbtab> . . .

  • For selecting a single record from a table:

SELECT SINGLE * FROM <dtab>

WHERE <condition>.

( full key )

ABAP statement and Keyword(con’t)

SELECT statement

  • For selecting individual columns from a table:


ABAP statement and Keyword(con’t)

SELECT statement

  • For excluding duplicates:

SELECT DISTINCT <f1> <f2> . . . <fn>

INTO (<g1> <g2> . . . <gn>)

FROM <dbtab> . . .

  • Aggregate expressions:

SELECT

AVG( <f1> )

COUNT( DISTINCT <f1> )

COUNT( * )

MAX( <f1> )

MIN( <f1> )

SUM( <f1>

FROM <dbtab> . . .

INTO (<g1> . . . <gn>)


ABAP statement and Keyword(con’t)

SAP Table

  • Two dimensional matrix describing relationship in database system

  • Components:

    • Table fields

    • Foreign keys

    • Technical Settings

    • Indexes


ABAP statement and Keyword(con’t)

Internal Table

  • One way to process large quantities of data in ABAP

  • Internal table is a dynamic sequential dataset in which all records have the same structure and a key

  • The data is taken from a fixed structure, stored line by line in the memory


ABAP statement and Keyword(con’t)

Internal Table Declaration <No header line>

TYPES:

BEGIN OF T_T001K,

BWKEY LIKE T001K-BWKEY,

BUKRS LIKE T001K-BUKRS,

END OF T_T001K.

DATA:

IT_T001K TYPE T_T001K OCCURS 0.


ABAP statement and Keyword(con’t)

Internal Table Declaration <With header line>

DATA:

BEGIN OF IT_T001K OCCURS 0,

BWKEY LIKE T001K-BWKEY,

BUKRS LIKE T001K-BUKRS,

END OF IT_T001K.

  • WITH HEADER LINE


ABAP statement and Keyword(con’t)

SAP --> Internal table

Allows us to get contents of table and put it into internal table

SELECT <field1> <field2>.. <fieldn>

FROM <table>

INTO TABLE <internal table>

WHERE <condition>


ABAP statement and Keyword(con’t)

LOOP Command

  • To perform looping operation in the flow logic

  • Four kinds of loops in ABAP:

    • Unconditional loops using the DO statement

    • Conditional loops using the WHILE statement

    • Loops through internal tables and extract datasets using the LOOP statement

    • Loops through datasets from database tables using SELECT statement


SY-INDEX

ABAP statement and Keyword(con’t)

DO Command

DO <n> TIMES.

ENDDO.

statements

Loop index


SY-INDEX

ABAP statement and Keyword(con’t)

WHILE Command

WHILE <logical expression>.

ENDWHILE.

statements

Loop index

WHILE COUNTER > 0.

.

.

.

SUBTRACT 1 FROM COUNTER.

ENDWHILE.


ABAP statement and Keyword(con’t)

LOOP Command Example

LOOP AT IT_T001K.

WRITE: / IT_T001K-BWKEY.

ENDLOOP.


ABAP statement and Keyword(con’t)

WRITE Command

The basic ABAP statement for displaying data on the screen

WRITE <f> <AT position(length)>

<option>

<AS CHECKBOX>

<AS SYMBOL>

<AS ICON>

<AS LINE>


ABAP statement and Keyword(con’t)

WRITE Command

  • <OPTION> behind the WRITE statement is for formatting options

  • E.g. : ..NO-ZERO, NO-SIGN, No GROUPING, DD/MM/YY,

    • LEFT-JUSTIFIED, CENTERED, RIGHT-JUSTIFIED

  • The most commonly used options:

    • CURRENCY w

      to treat the content of field <f> as a currency amount with w as a currency key

    • DECIMALS d

      to determine number of decimals to be displayed

    • UNIT u

      to format the value according to the unit specified in the field u. The content of field <f> is treated as a quantity.


ABAP statement and Keyword(con’t)

WRITE Command Example

WRITE: / ‘Write’.

WRITE: it_bseg-dmbtr CURRENCY it_bkpf-hwaer.

WRITE: text-t01 LEFT-JUSTIFIED.


ABAP statement and Keyword(con’t)

Comment

  • Written between statements of the ABAP program to explain its purpose to a reader / for internal documentation

  • Helps to understand and change the program

  • Flagged by special character:

    • Asterisk (*) entire line to be a comment

    • Double quotation mark (“) part of a line to be a comment

  • Ignored by the system


ABAP statement and Keyword(con’t)

Comment example

* Write Sales Order number to the screen

Write: ‘Sales Order : ‘,

20 it_vbak-vbeln. “Sales Order Number


ABAP statement and Keyword(con’t)

Expression & Operation

  • Relational Operator

  • String Comparison

  • Logical Expression

  • If/Case/Check Statement

  • Exit/Continue Statement


Display

Meaning

EQ = Equal to

NE <> >< Not equal to

GT > Greater than

GE >= => Greater than or equal to

LT < Smaller than

LE <= =< Smaller than or equal to

DATA: START TYPE D,

SUM1 TYPE F,

SUM2 TYPE P.

.

.

.

IF START IS INITIAL ... .

IF SUM1 GT SUM2 ... .

IF SUM1 BETWEEN 0 AND 100 ... .

BETWEEN f1 and f2 Interval

IS INITIAL Initial value

ABAP statement and Keyword(con’t)

Relational Operator


<f1> CO <f2> contains only: f1 contains only characters from f2

ACCOUNT CO '0123456789'

<f1> CA <f2> contains any: f1 contains at least one character

from f2

<f1> CS <f2> contains string: f1 contains the string f2

'ABCDE' CS 'DE'

<f1> CP <f2> contains pattern: f1 corresponds to the model f2

Model:

* any string

+ any character

# escape symbol

'ABXDE' CP '*B+D*'

ABAP statement and Keyword(con’t)

String Comparison


Logical expression

COUNTER GE 0

COUNTER GT 0 AND

FLAG IS INITIAL

( FLAG1 NE SPACE OR FLAG2

NE SPACE ) AND COUNTER

BETWEEN 0 AND 100

COUNTER EQ 0 AND NOT

( FLAG1 EQ SPACE AND FLAG2

EQ SPACE )

ABAP statement and Keyword(con’t)

Logical Expression

1. AND

2. OR

3. NOT


If statement

IF <logical expression>.

ENDIF.

IF <logical expression>.

ELSE.

ENDIF.

IF <logical expression>.

ELSEIF <logical expression>.

ELSEIF <logical expression>.

ELSE.

ENDIF.

statements

statements

statements

statements

statements

statements

statements

ABAP statement and Keyword(con’t)

IF Statement


CASE <field>.

WHEN <value1>.

WHEN <value2>.

WHEN <value3>.

WHEN OTHERS.

ENDCASE.

statements

statements

statements

statements

ABAP statement and Keyword(con’t)

CASE statement

  • Execute different statement blocks depending on the contents of particular data fields

  • WHEN OTHERS:

    • contents of <field> does not equal to any of the <value?> contents


CHECK <logical expression>.

1

CHECK within a loop structure.

WHILE COUNTER GT 0.

CHECK FLAG NE SPACE.

ENDWHILE.

statements

statements

2

CHECK outside loop structures.

statements

CHECK <condition>.

statements

ABAP statement and Keyword(con’t)

CHECK statement

  • Within Loop:

    to terminate loop

    pass conditionally


EXIT.

1

EXIT within a loop structure.

DO ...

IF COUNTER GE 100.

EXIT.

ENDIF.

ENDDO.

statements

statements

EXIT outside loop structure.

2

statements

IF ... .

EXIT.

ENDIF.

statements

ABAP statement and Keyword(con’t)

  • Terminate loop entirely without any condition

  • Terminate a subroutine without any condition


CONTINUE.

DO 100 TIMES.

IF SY-INDEX GE 10

AND SY-INDEX LE 20.

CONTINUE.

ENDIF.

ENDDO.

statements

statements

ABAP statement and Keyword(con’t)

  • Terminate loop pass immediately without any condition


PROGRAM RSDEMO01.

Call calculate_tax

.

.

.

Subroutine

Calculate_tax

PROGRAM RSDEMO02.

PROGRAM RSDEMO04.

.

.

.

Subroutine SUB1

Call calculate_tax

Subroutine

Calculate_tax

.

.

.

PROGRAM RSDEMO03.

ABAP/4 function library

.

.

.

Call calculate_tax

Function module

Calculate_tax

Function module

ABAP statement and Keyword(con’t)

  • Avoid redundancy

  • Modularization:

    • easy to read

    • easy to call


ABAP statement and Keyword(con’t)

  • Define

    FORM <name> [<parameters>].

    <statement block>

    ENDFORM.

  • Calling internally

    PERFORM <name> [<parameters>].

  • Calling external subroutine

    PERFORM <name>(program name) <parameters> [IF FOUND]


ABAP statement and Keyword(con’t)

form f_check_file_exists using filename.

.............

endform.

Parameters:

p_path like rlgrap-filename.

..............................

perform f_check_file_exists using p_path.


Content

  • Introduction R/3 Basis system overview

  • ABAP/4 overview

    • Component, Program, ABAP dictionary, Function Module , Message/Transaction code, etc.

  • Common Statement / Command

    • - Main event in ABAP program

    • - General ABAP command

  • Transportation for ABAP objects

  • Type of problem and how to investigate

    • Program bug, ABAP runtime error, Update terminate, Unexpected error message.


Transportation of ABAP objects

Type of ABAP object

In Workbench organizer, there are several ABAP objects which are transportable

Object In Transport request contain the following key

PgmID: Program Id in request and task, normally there are 2 types for ABAP objects

R3TR - name for R/3 Repository objects and Customizing objects

LIMU - enables transport of R/3 Repository object components

Obj: Object type (for example, DOMA, DTEL, FORM, PROG..)

Object name:

Name of the each object

Funct.: Function D,K,M

ObjStatus: LOCKED,ERR_IMP,OK_IMP and OK_GEN


Transportation of ABAP objects (con’t)

  • Versionmanagement

  • serves different purposes and user groups:

    - The developer can keep track of his or her work ("What have I changed?")

    - The developer can restore a previous version by reactivating it.

    - The system administrator can monitor work ("Which objects were changed and how were they changed in a specific time interval?")

    - It provides the basis for the auditor, who requires a complete history of changes.

    - It enables customers to adjust data with the help of the system after upgrading to a new Release.


Transportation of ABAP objects (con’t)

ABAP object Version compare

ABAP program

Transaction code SE38, Under menu Utilities-->Version management

Function module

Transaction code SE37, Under menu Utilities-->Version management

Data Dictionary

Transaction code SE11, Under menu Utilities-->Version management

Object Browser

Transaction code SE80, Go to specific object and under menu utilities, Version management

Workbench Organization

Transaction code SE09, under menu Environment


Transportation of ABAP objects (con’t)

ABAP object Version compare

From Version management, you can

1. Display the object in other version

2. Compare the object in 2 versions

3. Retrieve the content of older version

4. Remote compare with another system

5. Display Transport Request


Content

  • Introduction R/3 Basis system overview

  • ABAP/4 overview

    • Component, Program, ABAP dictionary, Function Module , Message/Transaction code, etc.

  • Common Statement / Command

    • - Main event in ABAP program

    • - General ABAP command

  • Transportation for ABAP objects

  • Type of problem and how to investigate

    • Program bug, ABAP runtime error, Update terminate, Unexpected error message.


Type of problem & How to investigate

Type of problems

ABAP Runtime Error

Cause: Program error, system exception, database process error, etc.

Using transaction code ST22 to analyze error.

Unexpected message

Update Terminate

Cause: Update module can not be completed

Program bug

Cause: Written code is not correct


ABAP Runtime error - Analysis

Error ID

Date and time

Double click to display detail


Unexpected message

  • How to deal with unexpected message?

  • 1. Go to Message long text if available.

  • 2. Read through the section in the message help text, process where appropriate.

  • Message help text component

    • Diagnosis

    • System response

    • Procedure

  • 3.Find the message location, the logic that drive the message appearance.

    • Debugging

    • Use “Where used list” function to find out the code where message is located (Not applicable for dynamic call)


Unexpected message (con’t)

  • How to debug and locate the message in the program?

  • 1. Debugging

    Set Debugger ON

    In Debugging screen, Set dynamic breakpoint on command “Message”

    Select debugging -> Continue (F8)

    When program reach MESSAGE command, cursor will be stopped

    Check the above logic before get into the current command, see the related data/value from debugging screen.

  • 2. Using “Where used list” Function in message workbench SE91/SE80

    When message is displayed, Double click on the status bar(if the message appear only in status bar , not popup) OR press F1 for popup message.

    Go to transaction code SE91/SE80 to find the location of the message call.


Update terminate

Update terminate: Message/SAP internal mail will be sent to the transaction owner, either Error message Or ABAP runtime error (short dump) might be created.

Analyzing the error

Go to transaction code SM13 to analyze the update error.

(Or Select Tools --> Administration --> Monitoring --> Update)

Go to detail in update modules, You will get the following information:

Where the error occurred: Program name, function module, line number and error text. (go to ABAP short dump Or Editor to locate the position)

Why the error occurred:


Program bug

Analyzing the error

1. Find out what went wrong.

2. Locate the position in the ABAP program

How to find the right place?

1. Debugging

2. Use Call Hierarchy (SE48)

3. Use find function in ABAP editor


Simple Debugging

  • How to:

  • Switch on the debugger.

  • Set and delete static and dynamic breakpoints.

  • Set Watch points.

  • Stop a program at specific key words or events or when a fields contents change.

  • Continue processing after an interrupt.

  • Display field contents during runtime.

  • Display the contents of an internal table.

  • Change field contents for testing purposes.

  • Change the contents of an internal table.

  • Display and use the debugger’s six different views.


Simple Debugging

Start debugging:

/h Start the debugger in Normal mode. Press enter to start.

/hsStart the Debugger in System mode, for example, in order to debug the system program (program with type S)

Appropriate menu options under system -> Utilities -> Debug ABAP

Break-points Command.

SE38 Start of programs in the debugging of transaction code SE38

SM50/SM51 via debugging menu

SE80 - Object browser


Simple Debugging

  • Set and delete static and dynamic breakpoints

  • Static break-point

    • Command BREAK-POINT. Or BREAK <User name>

  • Dynamic break-point

    • In ABAP Editor SE38 --> Utilities --> Breakpoints --> Display/Set

    • In Debugging mode

      • Place the cursor on the statement

      • Choosing break-point -> Set/Delete

    • At ABAP command

    • At Event/Subroutine

    • At Function module

    • System exception


Simple Debugging

Stepping

Display mode

Single step (F5)

Execute (F6)

Return (F7)

Continue (F8)

Field : Display content of fields up to 8 fields

Table: Display content of internal table

Watchpoints: Manage watchpoint during debug mode

Calls : Display Call stack up to current statement (in sequence)

Overview: structure of program, display event, sub routine, module and current statement


Simple Debugging

Caution when debugging in Production system

Since only a restricted number of dialog work processes can be switched to debugging mode, you should leave the debugger as soon as possible when you have finished working with it. Otherwise, the work process is not released for other users



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