How To Fix MC054 - The value of the U/L flag does not fit the domain of the data element

MC054 - Overview

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 054

• Message text: The value of the U/L flag does not fit the domain of the data element

What causes this issue?

In transparent matchcode IDs, the contents of the uppercase/lowercase
flag depends on the domain of the corresponding data element,
i.e. if the domain permits uppercase/lowercase, the U/L flag must
also be set. Otherwise the matchcode search will not function properly.
Unfortunately, in previous versions it was possible to change the value
of the U/L flag and the corresponding domain was not checked.

System Response

The system found an inconsistency between the value of the U/L flag and
the corresponding domain.

How to fix this error?

Change to change mode. The system automatically sets the correct value
in the U/L flag. Save the change. The matchcode ID must be activated
again.

Error message extract from SAP system. Copyright SAP SE.

MC054 - Details

• The SAP error message MC054, which states "The value of the U/L flag does not fit the domain of the data element," typically occurs in the context of Material Management (MM) or Production Planning (PP) modules when there is an issue with the data being processed, particularly related to the U/L (Upper/Lower) flag.
  
  Cause:
  
  
  Data Type Mismatch: The value being assigned to the U/L flag does not conform to the expected data type or range defined in the domain of the data element. For example, if the U/L flag is expected to be a single character (like 'U' for Upper or 'L' for Lower), and a different value is being passed, this error will occur.
  
  
  Incorrect Configuration: There may be a configuration issue in the settings related to the U/L flag in the relevant SAP module. This could be due to incorrect settings in the material master or other related master data.
  
  
  Custom Development: