How To Fix GU646 - Only field name & is allowed in this session

SAP Error Message - Details

• Message type: E = Error

• Message class: GU - FI-SL utilities

• Message number: 646

• Message text: Only field name & is allowed in this session

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GU646 - Only field name & is allowed in this session ?

  The SAP error message GU646 ("Only field name & is allowed in this session") typically occurs when there is an issue with the field names being used in a particular session or transaction. This error is often related to the use of field names that are not recognized or are not allowed in the current context.
  Cause:
  
  Field Name Mismatch: The field name being referenced in the session does not match the expected field names defined in the system.
  Session Context: The error may arise if the session is trying to access a field that is not available in the current context or transaction.
  Custom Development: If there are custom programs or enhancements, they may be incorrectly referencing field names.
  Data Dictionary Changes: Changes in the data dictionary (like field renaming or deletion) can lead to this error if the session is still trying to access the old field names.
  
  Solution:
  
  Check Field Names: Verify that the field names being used in the session are correct and match the definitions in the data dictionary.
  Review Custom Code: If the error is occurring in a custom program, review the code to ensure that it is referencing the correct field names.
  Transaction Context: Ensure that the transaction or session you are in is appropriate for the field you are trying to access. Some fields may only be available in specific transactions.
  Debugging: If you have access to debugging tools, you can debug the program to see where the error is occurring and what field names are being referenced.
  Consult Documentation: Check SAP documentation or notes related to the specific transaction or program to see if there are known issues or updates.
  Contact Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  SAP Notes: Look for SAP Notes related to the specific transaction or program you are using. These notes may provide insights into known issues and fixes.
  Transaction Codes: Familiarize yourself with the transaction codes involved in the process to understand the context better.
  User Authorizations: Ensure that you have the necessary authorizations to access the fields in question, as lack of authorization can sometimes lead to unexpected errors.
  
  By following these steps, you should be able to identify the cause of the GU646 error and implement a solution.