debugging in sap

7/27/2019 Debugging in SAP

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ABAP DebuggingABAP Debugging

Presented by,Presented by,

Sylendra Prasad MSylendra Prasad M


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Agenda for the dayAgenda for the day

DebuggingDebugging An overviewAn overview


DebuggingDebugging Getting startedGetting started

Debugging ToolsDebugging Tools

Debugging in BackgroundDebugging in Background


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DebuggingDebugging An overviewAn overview

Stepwise method of finding out errors or bugs.Stepwise method of finding out errors or bugs.

The basic steps involveThe basic steps involve Recognize that the bug existsRecognize that the bug exists

Isolate source of bugIsolate source of bug

Identify cause of bugIdentify cause of bug Determine the fix for the bugDetermine the fix for the bug

Apply the fix and test it.Apply the fix and test it.

Software Debugging is done by special softwareSoftware Debugging is done by special software

called debuggers.called debuggers.


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ABAPABAP DebuggerDebugger allowsallows youyou toto interruptinterrupt thethe

runningrunning programprogram afterafter eacheach step,step, allowingallowing youyou toto

checkcheck intermediateintermediate resultsresults andand processingprocessing logiclogic..

DebuggerDebugger cancan bebe calledcalled inin twotwo waysways..

ByBy settingsetting breakbreak pointspoints.. WriteWrite BREAKBREAK--POINTPOINT oror BREAKBREAK statementstatement inin program(static)program(static)

ClickClick STOPSTOP buttonbutton inin thethe toolbartoolbar ofof programprogram (dynamic)(dynamic)

ByBy runningrunning thethe programprogram inin debuggingdebugging modemode..

UsingUsing \\hh

SettingSetting breakbreak pointspoints atat specifiedspecified codecode lineslines..

DoubleDouble clickingclicking toto setset breakbreak pointspoints..


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DebuggingDebugging Getting startedGetting started

To switch on debugging, type /h and press enter.To switch on debugging, type /h and press enter.

Following buttons are used to continueFollowing buttons are used to continue

debugging.debugging.


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1.1. Single step: Used to step through the programSingle step: Used to step through the program

statement by statement.For subroutines, this will gostatement by statement.For subroutines, this will goinside the subroutine. .(F5 key can be used).inside the subroutine. .(F5 key can be used).

2.2. Execute: Similar to single step , but for subroutines,Execute: Similar to single step , but for subroutines,

this completely executes the subroutine,withoutthis completely executes the subroutine,withoutgoing inside the routine.(F6 key can be used).going inside the routine.(F6 key can be used).

3.3. Return: Used to return from a subroutine, or a calledReturn: Used to return from a subroutine, or a called

ro ram to a callin ro ram.ro ram to a callin ro ram.

4.4. Run: Used to process the program until the nextRun: Used to process the program until the next

static or dynamic break point.If no more breakpointsstatic or dynamic break point.If no more breakpoints

are there, this will exit the debugging mode andare there, this will exit the debugging mode and

executes the rest of the program normally(F8 key).executes the rest of the program normally(F8 key).5.5. Watchpoints: Used to interrupt the execution ofWatchpoints: Used to interrupt the execution of

program when variable reaches a particularprogram when variable reaches a particular

value.Will be discussed in detail later.value.Will be discussed in detail later.


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Break pointsBreak points

Causes program execution to stop at thatCauses program execution to stop at that

location and start the debugger.location and start the debugger.

Static BreakStatic Break--point.point. User independent breakpoint:User independent breakpoint:

Using statement BREAKUsing statement BREAK--POINT.POINT.

..

Useful in development phase and removed beforeUseful in development phase and removed before

transported.transported.

Can number the break points to identify them easier.Can number the break points to identify them easier.

User dependent breakpoint:User dependent breakpoint: Interrupted only for a specific user.Interrupted only for a specific user.

Using the statement BREAK .Using the statement BREAK .

Visible in program, but not active when other users use theVisible in program, but not active when other users use the

program.program.


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SAMPLE PROGRAMSAMPLE PROGRAM

Static break points must be removed fromStatic break points must be removed from

program after testing.program after testing.


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Dynamic break point:Dynamic break point:

Done by clicking on STOP button in toolbar ofDone by clicking on STOP button in toolbar of

program.program.

User specific break point.User specific break point.

No need to change the code.No need to change the code.

Can be set even when prog. is locked by any user.Can be set even when prog. is locked by any user.

Deleted when logged off the SAP system.Deleted when logged off the SAP system.


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30 dynamic break points can be set without30 dynamic break points can be set withoutchanging the program code.changing the program code.

Can be set directly in ABAP editor or whileCan be set directly in ABAP editor or while

debugging.debugging. While debugging, break points can be set orWhile debugging, break points can be set or

deleted by double clicking the line of code.deleted by double clicking the line of code.

OROR


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Different methods of using break pointsDifferent methods of using break points

Break points at ABAP Statements:Break points at ABAP Statements:

SelectSelect BreakpointBreakpoint -->Breakpoint at>Breakpoint at --> Statement> Statement


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Break point at Function Modules & SubroutinesBreak point at Function Modules & Subroutines

Similarly, break points can be set for Function Modules, Methods,Similarly, break points can be set for Function Modules, Methods,Exceptions etc.Exceptions etc.


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Saving and Deleting Break pointsSaving and Deleting Break points

Dynamic break points can be saved so that they are still active within the same session.Dynamic break points can be saved so that they are still active within the same session.

Break points will remain active until you delete it or you logoff the system.Break points will remain active until you delete it or you logoff the system.

Break points can be deleted either by double clicking on the break point or selecting the menuBreak points can be deleted either by double clicking on the break point or selecting the menuoptionoption

ChooseChoose-->Create/Delete or>Create/Delete or

ChooseChoose-->Delete all>Delete all


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Watch pointsWatch points

Used to interrupt program, when contents of fieldUsed to interrupt program, when contents of field

or structure change.or structure change.

Can save up to 5 watch points including watchCan save up to 5 watch points including watch

points for strings.points for strings.

an e oca or g o aan e oca or g o a Local watch points valid only in a specified programLocal watch points valid only in a specified program

Global watch points valid only in a specified programGlobal watch points valid only in a specified program

and all the programs it calls.and all the programs it calls.


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Procedure to set Watch pointsProcedure to set Watch points

Choose menu optionChoose menu option BreakpointBreakpoint --> Create watchpoint> Create watchpoint

or the corresponding Pushbuttonor the corresponding Pushbutton

OROR

Provide the program name, variable name ,Provide the program name, variable name ,

relational operator(=,


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So whenever gd_tcodeSo whenever gd_tcode--tcode becomes KO8G, the program execution will betcode becomes KO8G, the program execution will beinterrupted.interrupted.


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Debugging ToolsDebugging Tools

Use the following buttons during debugging.Use the following buttons during debugging.

Contents can be displayed by double clicking onContents can be displayed by double clicking onthe field name while debugging.the field name while debugging.

Fields: can be used to get values of single fields.Fields: can be used to get values of single fields.


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Table: can be used to get internal table values.Table: can be used to get internal table values.


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The internal table data , during debugging, canThe internal table data , during debugging, can

be downloaded to excelsheet, by clicking onbe downloaded to excelsheet, by clicking onSaveSave

as excel worksheetas excel worksheetbutton and giving the number ofbutton and giving the number of

rows to be downloadedrows to be downloaded..

Watch points and Break points: can be used toWatch points and Break points: can be used todisplay them in the main program.display them in the main program.


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Debugging in BackgroundDebugging in Background

Debugging can be done for programs scheduled to runDebugging can be done for programs scheduled to runin background.in background.

Job should be either in Scheduled or Released status.Job should be either in Scheduled or Released status.

After scheduling the program to run in background,After scheduling the program to run in background,

select the job in SM37 and typeselect the job in SM37 and typejdbgjdbg in the commandin the command

area.area.

Now the debugger is activated.Now the debugger is activated.


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Reference documentsReference documents

SAP Help documentsSAP Help documents

http://www.sappro.com/http://www.sappro.com/ ExperienceExperience


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debugging in sap

Documents