How To Fix RMSL021 - Interface parameter *_OLD is missing

SAP Error Message - Details

• Message type: E = Error

• Message class: RMSL - Labeling Application Messages

• Message number: 021

• Message text: Interface parameter *_OLD is missing

What causes this issue?

An interface parameter *_NEW contains an entry that is marked with 'U'
for UPDATE in the LINEMODE field. You need the original form of this
table row in *_OLD to be able to create a change document item for the
other fields.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RMSL021 - Interface parameter *_OLD is missing ?

  The SAP error message RMSL021, which states that the interface parameter *_OLD is missing, typically occurs in the context of the SAP Retail Management System (RMS) or similar modules where data interfaces are involved. This error indicates that a required parameter, usually related to the old value of a data field, is not being passed correctly in the interface.
  Cause:
  
  Missing Parameter: The most common cause is that the interface is not providing the expected old value parameter. This can happen due to incorrect configuration or programming errors in the interface.
  Data Transfer Issues: If the data is being transferred from one system to another (e.g., from a legacy system to SAP), the mapping of fields may not be set up correctly, leading to missing parameters.
  Custom Development: If there are custom developments or enhancements in the system, they may not be handling the old value parameters correctly.
  Version Mismatch: Sometimes, if there are version mismatches between different components of the system, it can lead to missing parameters.
  
  Solution:
  
  Check Interface Configuration: Review the configuration of the interface to ensure that all required parameters, including *_OLD, are correctly defined and mapped.
  Debugging: If you have access to the development environment, use debugging tools to trace the execution of the interface and identify where the parameter is being lost or not set.
  Review Custom Code: If there are any custom developments, review the code to ensure that it correctly handles the old value parameters.
  Consult Documentation: Refer to the SAP documentation for the specific module you are working with to understand the expected parameters and their usage.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide patches or updates that could resolve the issue.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that the interface works as expected.
  
  Related Information:
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide insights based on the specific version and configuration of your SAP system.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can share their solutions.
  Documentation: Always refer to the latest SAP documentation for your specific version and module, as it may contain important information regarding interface parameters and their requirements.
  
  By following these steps, you should be able to identify the cause of the RMSL021 error and implement a solution to resolve it.