How To Fix O5122 - Error occurred when customer function & was called off.

O5122 - Overview

• Message type: E = Error

• Message class: O5 - IS-Oil: MCOE message pool

• Message number: 122

• Message text: Error occurred when customer function & was called off.

What causes this issue?

The external details screen has been processed. During processing and
before output, the system performs
customer function 001. This customer function results in an error.

System Response

The transaction is ended.

How to fix this error?

Make a note of what you did immediately before this error and contact
the SAP hotline.

Error message extract from SAP system. Copyright SAP SE.

O5122 - Details

• The SAP error message O5122, which states "Error occurred when customer function & was called off," typically indicates that there is an issue with a custom function module or enhancement that has been implemented in the SAP system. This error can occur in various contexts, such as during the execution of a transaction, report, or batch job where the custom function is invoked.
  Causes:
  
  Coding Errors: There may be bugs or exceptions in the custom function code that prevent it from executing properly.
  Missing or Incorrect Parameters: The function might be called with incorrect or missing parameters, leading to runtime errors.
  Authorization Issues: The user executing the function may not have the necessary authorizations to call the custom function.
  Data Issues: The data being processed by the function may not meet the expected format or constraints, causing the function to fail.
  Transport Issues: If the function was recently transported from a development environment to production, there