How To Fix 28156 - ABAP function module does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 156

• Message text: ABAP function module does not exist

What causes this issue?

The syntax check found an error in the function entry &V1&. The
function module does not exist.

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?

Check your entry for the function or create the function module.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28156 - ABAP function module does not exist ?

  The SAP error message "28156: ABAP function module does not exist" typically indicates that the system is trying to call an ABAP function module that is not available in the system. This can happen for several reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  Function Module Not Created: The function module may not have been created or activated in the system.
  Transport Issues: If the function module was recently transported from another system, the transport may not have been successful, or the function module may not have been included in the transport request.
  Namespace Issues: The function module might exist in a different namespace or client, and the system is unable to access it.
  Authorization Issues: The user may not have the necessary authorizations to access the function module.
  System Version: The function module may exist in a different version of SAP or may have been deprecated in the current version.
  
  Solutions:
  
  Check Existence: Use transaction SE37 (Function Builder) to check if the function module exists. If it does not, you may need to create it or find out why it is missing.
  Transport Request: If the function module was supposed to be transported, check the transport logs to ensure it was successfully imported. If not, you may need to re-transport it.
  Namespace Verification: Ensure that you are calling the function module from the correct namespace. If it is a custom function module, verify that it is in the correct package.
  Authorization Check: Ensure that the user has the necessary authorizations to execute the function module. You can check this using transaction SU53 after the error occurs.
  Debugging: If you have access to the ABAP debugger, you can set a breakpoint in the code that calls the function module to see what parameters are being passed and if there are any issues in the calling code.
  Consult Documentation: If the function module is part of a standard SAP package, consult the SAP documentation or notes to see if there are any known issues or changes related to that function module.
  
  Related Information:
  
  Transaction Codes: SE37 (Function Builder), SE80 (Object Navigator), SE11 (Data Dictionary), SU53 (Authorization Check).
  SAP Notes: Check the SAP Support Portal for any relevant notes that might address issues with the specific function module.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that might provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to your SAP Basis or development team for further assistance.