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

GU646 - Overview

• 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