How To Fix WG402 - Errors withour detailed information on calling FM: &1 occurred

SAP Error Message - Details

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 402

• Message text: Errors withour detailed information on calling FM: &1 occurred

What causes this issue?

Errors occurred in a function module for which there is no more
detailed information (e.g. a system error)

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

System Response

How to fix this error?

Try again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WG402 - Errors withour detailed information on calling FM: &1 occurred ?

  The SAP error message:
  WG402 Errors without detailed information on calling FM: &1 occurred
  typically occurs in the context of SAP Workflow (transaction SWI1, SWIA, or related workflow processing) or when a function module (FM) is called during workflow execution and an error happens, but the system cannot provide detailed information about the error.
  
  Cause
  
  Generic error in a called function module during workflow processing: The workflow runtime calls a function module (FM) identified by &1 (the placeholder is replaced by the actual FM name at runtime), and this FM raises an error or exception.
  Lack of detailed error information: The FM does not return detailed error messages or the error is not properly propagated back to the workflow engine.
  Missing or incorrect error handling in the FM: The FM might be catching exceptions internally without re-raising them or without providing detailed messages.
  Authorization or system issues: Sometimes, the FM fails due to missing authorizations, missing data, or system inconsistencies, but these are not detailed in the error message.
  Custom or Z-function modules: If the FM is a custom development, it might not be handling errors properly.
  
  
  Solution
  
  
  Identify the function module causing the error:
  
  Check the exact FM name in the error message (the &1 placeholder).
  Use transaction ST22 (ABAP dump analysis) to see if there are any short dumps related to the FM.
  Use transaction SM21 (system log) or SLG1 (application log) to find related error logs.
  
  
  
  Analyze the FM:
  
  Review the source code of the FM to check how errors are handled.
  Check if the FM raises exceptions or returns error messages properly.
  If it is a standard SAP FM, check OSS notes for known issues.
  If it is a custom FM, ensure proper exception handling and message propagation.
  
  
  
  Enhance error handling:
  
  Modify the FM to provide detailed error messages or raise exceptions that the workflow engine can catch.
  Ensure that the FM does not suppress errors silently.
  
  
  
  Check authorizations and data consistency:
  
  Verify that the user executing the workflow has the necessary authorizations.
  Check that all required data for the FM is available and consistent.
  
  
  
  Debug the workflow:
  
  Use transaction SWI1 or SWUS to monitor workflow errors.
  Use the workflow debugger (transaction SWUD) to step through the workflow and see where the error occurs.
  
  
  
  Apply SAP Notes:
  
  Search SAP Support Portal for OSS notes related to the FM or the workflow error message WG402.
  Apply relevant patches or corrections.
  
  
  
  
  Related Information
  
  SAP Workflow Error Handling: Proper error handling in workflows requires that called FMs raise exceptions or return messages that the workflow engine can interpret.
  Transaction Codes:
  
  SWI1 - Workflow log
  SWIA - Workflow administration
  ST22 - ABAP dump analysis
  SM21 - System log
  SLG1 - Application log
  SWUD - Workflow debugger
  
  
  SAP Notes: Search for notes related to the specific FM or workflow error.
  Common causes: Missing authorizations, missing data, incorrect FM implementation, or system inconsistencies.
  
  
  If you provide the exact FM name (&1), I can help you look for more specific information or known issues related to that FM.