How To Fix RMSL_WUI020 - Interface parameter was not filled correctly

RMSL_WUI020 - Overview

• Message type: E = Error

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

• Message number: 020

• Message text: Interface parameter was not filled correctly

What causes this issue?

One of the following values was expected in the LINEMODE field: 'I' for
INSERT, 'D' for DELETE, or 'U' for UPDATE.

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_WUI020 - Details

• The SAP error message RMSL_WUI020, which states "Interface parameter was not filled correctly," typically occurs in the context of the SAP Retail Management System (RMS) or related applications. This error indicates that there is an issue with the parameters being passed to a function module or interface, which may not be filled out correctly or may be missing required values.
  Causes:
  
  Missing Parameters: Required parameters for the interface are not provided or are left blank.
  Incorrect Data Types: The data types of the parameters being passed do not match the expected types defined in the interface.
  Invalid Values: The values provided for the parameters may not be valid or may not meet the expected criteria (e.g., out of range, incorrect format).
  
  Configuration Issues: There may be configuration settings in the system that are not set up correctly, leading to the interface not functioning as expected.
  Custom Code Issues: If there is custom code involved, it may