How To Fix WLC_PARALLEL043 - The FM &1 for the data preselection ended with undefined error

SAP Error Message - Details

• Message type: E = Error

• Message class: WLC_PARALLEL - Load Distribution and External Parallel Processing

• Message number: 043

• Message text: The FM &1 for the data preselection ended with undefined error

What causes this issue?

The function module &V1& has finished with errors. Unfortunately, the
function module itself has not given any error messages to describe the
error in detail.
The function module was entered in <DS:TRAN.WLCPARC>Customizing</> for
parallel processing the report &V2& externally to select the worklist
in advance. This is always the case, if the worklist cannot be selected
generically.

System Response

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

How to fix this error?

The function module &V1& was not created by SAP and you must contact
the author. The function module may have to be corrected or, at least,
enhanced to include a clearer error message.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WLC_PARALLEL043 - The FM &1 for the data preselection ended with undefined error ?

  The SAP error message WLC_PARALLEL043 indicates that a function module (FM) related to data preselection has encountered an undefined error during its execution. This error typically arises in the context of parallel processing, where multiple tasks are executed simultaneously.
  Cause:
  
  Function Module Issues: The function module specified in the error message may have coding issues, such as unhandled exceptions or logic errors.
  Data Issues: The data being processed may be inconsistent or corrupt, leading to unexpected behavior in the function module.
  Configuration Problems: There may be configuration issues in the system that affect how the function module operates.
  Resource Limitations: Insufficient system resources (like memory or processing power) can lead to failures in parallel processing.
  Transport Issues: If the function module was recently transported from another system, it may not have been properly configured or may be missing dependencies.
  
  Solution:
  
  Check the Function Module: Review the code of the function module specified in the error message. Look for any unhandled exceptions or logic errors that could lead to an undefined error.
  Analyze the Data: Check the data being processed by the function module. Ensure that it is valid and consistent. You may want to run the function module in a test environment with known good data.
  Review Configuration: Ensure that all relevant configurations are correct and that the system is set up properly for the function module to execute.
  Monitor System Resources: Check system performance and resource usage. If the system is under heavy load, consider optimizing the process or increasing resources.
  Debugging: Use the SAP debugger to step through the function module and identify where the error occurs. This can provide insights into what is causing the undefined error.
  Check Logs: Review system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the failure.
  Consult SAP Notes: Search the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches or updates.
  Contact SAP Support: If the issue persists and cannot be resolved internally, consider reaching out to SAP Support for assistance.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE37 (Function Module), SE80 (Object Navigator), or SLG1 (Application Log) to investigate further.
  Parallel Processing: Understanding how parallel processing works in SAP can help in diagnosing issues related to concurrency and resource management.
  Performance Tuning: If the error is related to performance, consider looking into performance tuning techniques for your SAP system.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution.