How To Fix /PF1/MSG_LOG_GUI851 - Unknown constant value: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /PF1/MSG_LOG_GUI -

• Message number: 851

• Message text: Unknown constant value: &1

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PF1/MSG_LOG_GUI851 - Unknown constant value: &1 ?

  The SAP error message /PF1/MSG_LOG_GUI851 Unknown constant value: &1 typically indicates that there is an issue with a constant value that the system is trying to interpret or process, but it cannot recognize it. This error can occur in various contexts, such as during the execution of a program, transaction, or report.
  
  Cause:
  
  Incorrect Configuration: The constant value being referenced may not be defined in the system or may have been deleted or modified incorrectly.
  Custom Development: If you are using custom programs or enhancements, the error may arise from hardcoded values or constants that are not properly defined.
  Transport Issues: If the error occurs after a transport, it could be due to missing objects or dependencies that were not transported correctly.
  Version Mismatch: If there are inconsistencies between different system versions (e.g., development, quality assurance, production), it may lead to this error.
  
  
  Solution:
  
  Check Configuration: Verify that the constant value referenced in the error message is