How To Fix PQ151 - Function module &1 is invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: PQ - HR-PD: Personnel Development

• Message number: 151

• Message text: Function module &1 is invalid

What causes this issue?

There are two possible causes for this.
The function module does not comply with the naming convention
('_CALC_VALUE_')
The function module is to be used for a criterion.
The following standard modules are not allowed for criteria:
Addition:,,,,<ls>'RHPA_CALC_VALUE_ADD'</>
Average:,,,,<ls>'RHPA_CALC_VALUE_AVERAGE'</>
Percent:,,,,<ls>'RHPA_CALC_VALUE_PERCENTAGE'</>

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message PQ151 - Function module &1 is invalid ?

  The SAP error message PQ151, which states "Function module &1 is invalid," typically occurs when there is an issue with a function module that is being called in the context of a process or transaction. This error can arise due to various reasons, including:
  Causes:
  
  Function Module Does Not Exist: The function module specified in the error message may not exist in the system.
  Function Module is Inactive: The function module might exist but is not active or has been deactivated.
  Authorization Issues: The user may not have the necessary authorizations to execute the function module.
  Transport Issues: If the function module was recently transported from another system, it may not have been properly imported or activated.
  Incorrect Configuration: The configuration settings that reference the function module may be incorrect or outdated.
  
  Solutions:
  
  
  Check Function Module Existence:
  
  Use transaction code SE37 (Function Builder) to check if the function module exists. Enter the name of the function module and see if it is available.
  
  
  
  Activate the Function Module:
  
  If the function module exists but is inactive, you can activate it in SE37.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to execute the function module. This can be checked using transaction SU53 or by consulting with your security team.
  
  
  
  Review Transport Logs:
  
  If the function module was recently transported, check the transport logs for any errors during the import process. You can use transaction STMS to review transport logs.
  
  
  
  Check Configuration:
  
  Review the configuration settings that reference the function module. Ensure that they are correctly set up and pointing to the right function module.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can set breakpoints in the code that calls the function module to see what parameters are being passed and if there are any issues in the calling logic.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SE37: Function Builder
  SE80: Object Navigator
  SU53: Authorization Check
  ST22: Dump Analysis
  STMS: Transport Management System
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Documentation: Review the documentation for the specific function module to understand its purpose and any prerequisites for its use.
  
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or development team for further assistance.