How To Fix MC746 - Field & is a language field. Check usage in key

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 746

• Message text: Field & is a language field. Check usage in key

What causes this issue?

The maintenance view you generated contains a language field as key
field. Make sure that this language field does not belong to a text
table whose corresponding entity table is also contained in the
maintenance view. The view maintenance automatically takes over the
text table through the key relationship, transports it, and fills the
language field of the text table in the logon language. This is the
only way to ensure that the translation function is availalbe in an
unlimited fashion and the transport of your maintenance view functions
problem-free.
Using the language field as a key field is not an error if the entity
table is not included in the maintenance view.

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?

Delete the language field from the view definition.

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 MC746 - Field & is a language field. Check usage in key ?

  The SAP error message MC746 ("Field & is a language field. Check usage in key") typically occurs in the context of Material Management (MM) or Logistics when there is an issue with the configuration of a key field that is expected to be a language field. This error indicates that the system is trying to process a field that is defined as a language field, but it is being used in a context where it is not appropriate.
  Cause:
  
  Incorrect Field Usage: The field in question is defined as a language field in the database or configuration, but it is being used in a way that does not align with its definition.
  Configuration Issues: There may be a misconfiguration in the data model or in the way the key fields are defined in the relevant tables or structures.
  Data Entry Errors: If a user is trying to enter data into a field that is supposed to be a language field, but the data does not conform to the expected format, this error can occur.
  
  Solution:
  
  Check Field Definition: Review the field definition in the relevant table or structure to ensure that it is correctly defined as a language field. You can do this using transaction codes like SE11 (Data Dictionary) or SE80 (Object Navigator).
  Review Key Usage: Check how the field is being used in the key of the relevant table or structure. Ensure that it is not being incorrectly included in a key where it should not be.
  Data Validation: Ensure that any data being entered into the field conforms to the expected format for a language field. Language fields typically expect language codes (like 'EN' for English, 'DE' for German, etc.).
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the configuration of language fields and their usage in your specific context.
  Debugging: If the issue persists, consider using debugging tools to trace the execution and identify where the error is being triggered.
  
  Related Information:
  
  Language Fields in SAP: Language fields are used in various SAP modules to store text in multiple languages. They are typically defined in a way that allows for internationalization of data.
  Transaction Codes: Familiarize yourself with transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), and SE37 (Function Module) to investigate the issue further.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  
  If you continue to experience issues after following these steps, it may be beneficial to consult with your SAP Basis or technical team for further assistance.