How To Fix RSTT0096 - Unable to process function module &1 (&2) due to invalid interface

SAP Error Message - Details

• Message type: E = Error

• Message class: RSTT0 - Trace Tool: Message Class Engine Layer

• Message number: 096

• Message text: Unable to process function module &1 (&2) due to invalid interface

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSTT0096 - Unable to process function module &1 (&2) due to invalid interface ?

  The SAP error message RSTT0096 indicates that there is an issue with a function module that cannot be processed due to an invalid interface. This error typically arises in the context of performance analysis or tracing, particularly when using transaction ST05 (SQL Trace) or ST12 (Combined Trace).
  Cause:
  
  Invalid Function Module Interface: The function module specified in the error message has an interface that does not match the expected parameters. This could be due to changes in the function module's definition or incorrect usage in the calling program.
  Missing or Incorrect Parameters: The function module may be called with incorrect or missing parameters, leading to an invalid interface.
  Transport Issues: If the function module was recently transported from another system, there may be inconsistencies in the interface due to version differences.
  Development Errors: If the function module was modified recently, there may be errors in the code that affect its interface.
  
  Solution:
  
  Check Function Module Definition: Go to transaction SE37 (Function Builder) and check the definition of the function module mentioned in the error message. Ensure that the interface (import/export parameters) is correctly defined.
  Review Calling Program: Look at the program or transaction that is calling the function module. Ensure that it is passing the correct parameters as defined in the function module.
  Transport Consistency: If the function module was transported, ensure that all related objects (like data elements, domains, etc.) are also transported and consistent across systems.
  Debugging: Use the debugger to step through the code where the function module is called. This can help identify if the parameters being passed are valid.
  Check for Modifications: If the function module has been modified, check for any recent changes that might have affected its interface. If necessary, revert to a previous version.
  Consult Documentation: Review any documentation related to the function module to ensure that it is being used correctly.
  
  Related Information:
  
  Transaction Codes: 
  
  SE37: Function Builder to view and edit function modules.
  ST05: SQL Trace to analyze SQL statements and performance.
  ST12: Combined Trace for performance analysis.
  
  
  SAP Notes: Check SAP Notes for any known issues related to the specific function module or error message.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the issue causing the RSTT0096 error message.