How To Fix RMSL_WUI021 - Interface parameter *_OLD is missing

RMSL_WUI021 - Overview

• Message type: E = Error

• Message class: RMSL_WUI - Labeling Web UI: RMSL Class Messages Converted for Web UI

• 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.

RMSL_WUI021 - Details

• The SAP error message RMSL_WUI021, which indicates that the interface parameter *_OLD is missing, typically arises in the context of the SAP Retail Management System (RMS) or similar modules where data interfaces are involved. This error suggests that a required parameter for a specific function or interface is not being passed correctly.
  
  Cause:
  
  Missing Parameter: The error usually occurs when a required parameter (in this case, *_OLD) is not provided in the function call or interface.
  
  Configuration Issues: There may be issues with the configuration of the interface or the data model that leads to the absence of the expected parameter.
  Custom Development: If there are custom developments or enhancements in the system, they might not be correctly handling the parameters.
  Data Integrity Issues: If the data being processed is incomplete or corrupted, it may lead to missing parameters.
  
  
  Solution:
  
  Check Interface Definition: Review the interface definition to ensure that all required parameters, including *_OLD, are correctly