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How To Fix WZ237 - Unknown generation type in function module call


SAP Error Message - Details

  • Message type: E = Error

  • Message class: WZ - Workflow: Model objects

  • Message number: 237

  • Message text: Unknown generation type in function module call

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  • Self-Explanatory Message

    Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

    To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

    Unfortunately, there isn't any extra information in this error notice.



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Smart SAP Assistant

  • What is the cause and solution for SAP error message WZ237 - Unknown generation type in function module call ?

    Certainly! Here's a detailed explanation regarding the SAP error message:


    SAP Error Message: WZ237 Unknown generation type in function module call


    Cause:

    The error WZ237 with the text "Unknown generation type in function module call" typically occurs when a function module related to document or data generation is called with an invalid or unrecognized generation type parameter.

    • Generation type refers to a parameter or input that specifies the kind of document or data generation process to be executed.
    • If the function module receives a generation type value that it does not recognize or support, it raises this error.
    • This can happen due to:
      • Incorrect or missing configuration.
      • Custom code passing wrong or outdated generation type values.
      • Inconsistent or incomplete master data or customizing settings.
      • Transport or system inconsistencies where the generation type is not maintained or known.

    Common Scenarios:

    • When generating output documents (e.g., print, email, fax) in SD or MM.
    • During batch job executions that generate documents or data.
    • Custom developments or enhancements calling standard SAP function modules with incorrect parameters.
    • Issues in ALE/IDoc processing where generation types are used.

    Solution:

    1. Check the Generation Type Parameter:

      • Identify the function module call causing the error.
      • Verify the value passed as the generation type parameter.
      • Ensure it matches one of the valid generation types expected by the function module.
    2. Review Configuration:

      • Check the customizing settings related to document generation.
      • For example, in SD output determination, verify output types and their associated generation types.
      • Use transaction codes like NACE (Output Types) or relevant IMG nodes.
    3. Debug the Function Module:

      • Use the ABAP debugger to trace the function module call.
      • Check where the generation type is set and why an unknown value is passed.
    4. Check for OSS Notes:

      • Search SAP Support Portal for OSS notes related to error WZ237 or the specific function module.
      • Apply any relevant patches or corrections.
    5. Correct Custom Code:

      • If custom developments are involved, review the code to ensure correct generation type values are used.
      • Align with SAP standard values or extend the function module if necessary.
    6. Data Consistency:

      • Verify master data and transactional data consistency.
      • Recreate or correct any corrupted or incomplete data entries.

    Related Information:

    • Function Modules: The error is linked to function modules that handle document or data generation, such as output processing modules.
    • Transactions: NACE (Output Types), SPRO (IMG for configuration), and debugging tools.
    • SAP Notes: Check SAP OSS notes for specific fixes or explanations.
    • Customizing Paths: Depending on the module (SD, MM, FI), the generation type configuration might be under:
      • Sales and Distribution ? Basic Functions ? Output Control
      • Materials Management ? Purchasing ? Messages
    • Debugging: Use transaction SE37 to test the function module and SE80 or SE38 to debug.

    Summary:

    • Cause: Invalid or unknown generation type parameter passed to a function module.
    • Solution: Verify and correct the generation type value, check configuration, debug the function module, and apply SAP notes if needed.

    If you provide the exact function module name or the context (module, transaction), I can help you with more precise instructions or code snippets.

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