How To Fix CNV_10020280 - Elementary relationship &1: Spec. function module &2 has wrong interface

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 280

• Message text: Elementary relationship &1: Spec. function module &2 has wrong interface

What causes this issue?

Specific function module &V2& has been stored for single determination
for single path &V1&. However the interface is not defined correctly.

How to fix this error?

Correct the interface definition of function module &V2&. <ZH>Note that
it must be EXACTLY the same as for sample function module &V3&</>,
because internally the call is explicitly included in the coding.
<ZH>Note:</> The program for checking the interface definition compares
the definition for function module &V2& with the one for sample
function module &V3&. This is also why the interface parameters have to
have exactly the same names.
The best solution is to copy function module &V3& to the function
module you want to use.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020280 - Elementary relationship &1: Spec. function module &2 has wrong interface ?

  The SAP error message CNV_10020280 indicates that there is an issue with the interface of a specific function module in the context of a conversion or migration process. This error typically arises during data migration or conversion activities, particularly when using SAP's tools for data transformation.
  Cause:
  The error message suggests that the function module specified in the message has an incorrect interface. This could be due to several reasons:
  
  Mismatch in Parameters: The function module may have been modified, and its parameters do not match the expected parameters defined in the conversion program.
  Version Incompatibility: The function module might be from a different version of SAP or a different system where the expected interface is not aligned with the current system.
  Custom Development: If the function module is a custom development, it may not have been properly defined or updated to match the expected interface.
  Transport Issues: If the function module was transported from another system, it might not have been transported correctly, leading to interface discrepancies.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Function Module Interface:
  
  Go to transaction SE37 (Function Builder) and enter the function module name specified in the error message.
  Verify the parameters of the function module and ensure they match the expected interface as defined in the conversion program.
  
  
  
  Review Changes:
  
  If the function module has been recently modified, review the changes to ensure that the interface has not been altered in a way that would cause this error.
  
  
  
  Check for Version Compatibility:
  
  Ensure that the function module is compatible with the version of SAP you are using. If there are discrepancies, you may need to update or adjust the function module.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can set breakpoints in the conversion program to see where the error occurs and gather more context about the parameters being passed.
  
  
  
  Consult Documentation:
  
  Review any relevant documentation or notes from SAP regarding the specific conversion or migration process you are undertaking. There may be known issues or additional steps required.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. Provide them with the error message and any relevant details about your system and the migration process.
  
  
  
  Related Information:
  
  Transaction Codes: SE37 (Function Builder), SE80 (Object Navigator), ST22 (Dump Analysis), SM21 (System Log).
  SAP Notes: Check for any SAP Notes related to the specific function module or the migration process you are using. SAP Notes often contain fixes or workarounds for known issues.
  Documentation: Review the SAP Help Portal for documentation related to the specific migration tool or process you are using.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message CNV_10020280.