How To Fix RMSL021 - Interface parameter *_OLD is missing

RMSL021 - Overview

• 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.

RMSL021 - Details

• 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