How To Fix EB121 - Processing canceled; an exception was triggered in the user exit

EB121 - Overview

• Message type: E = Error

• Message class: EB - IS-U invoicing

• Message number: 121

• Message text: Processing canceled; an exception was triggered in the user exit

What causes this issue?

You have embedded a user-defined function in program &V1&. It uses
function module &V2&. An exception was triggered.

System Response

INCLUDE ISU_VERARB OBJECT DOKU ID TX

How to fix this error?

If you do not want the exception to occur, modify your function to fit
the changed data situation.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

EB121 - Details

• The SAP error message EB121, which states "Processing canceled; an exception was triggered in the user exit," typically indicates that a user exit (a point in the SAP program where custom code can be executed) has encountered an issue that caused the processing to be halted. This can happen for various reasons, including coding errors, incorrect data, or unexpected conditions in the user exit.
  Causes:
  
  Coding Errors: There may be bugs or logical errors in the custom code implemented in the user exit.
  Data Issues: The data being processed may not meet the expected criteria, leading to exceptions being raised.
  
  Configuration Issues: Incorrect configuration settings in the related modules can lead to unexpected behavior.
  Uncaught Exceptions: The user exit may not be handling exceptions properly, leading to an abrupt termination of processing.
  
  Solutions:
  
  Debugging: Use the SAP debugger to step through the user exit code to identify where the exception is being triggered. Look for any RAISE