How To Fix /PF1/MSG_LOG_GUI850 - Unknown constant name: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /PF1/MSG_LOG_GUI -

• Message number: 850

• Message text: Unknown constant name: &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_GUI850 - Unknown constant name: &1 ?

  The SAP error message /PF1/MSG_LOG_GUI850 Unknown constant name: &1 typically indicates that there is an issue with a constant or variable that the system is trying to reference but cannot find. This can occur in various contexts, such as during the execution of a program, transaction, or report.
  Cause:
  
  Missing Constants: The constant referenced by &1 is not defined in the system. This could be due to a missing configuration or a missing entry in a customizing table.
  Incorrect Program Logic: The program or report may have logic that references a constant that is not available in the current context.
  Transport Issues: If the program or configuration was recently transported from another system, it may not have included all necessary constants or settings.
  Language Issues: If the system is set to a different language, it may not find the constant if it is defined only in a specific language.
  
  Solution:
  
  Check Constants: Verify that the constant referenced by &1 is defined in the relevant customizing or configuration tables. You may need to consult with your SAP Basis or ABAP team to check the definitions.
  Debugging: If you have access to the ABAP code, you can debug the program to see where the constant is being referenced and why it is not found.
  Transport Check: If the issue arose after a transport, check the transport logs to ensure that all necessary objects were included in the transport request.
  Language Settings: Ensure that the language settings in your user profile are correct and that the constants are defined for the language you are using.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error message or provide additional context.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), or SE37 (Function Module) to investigate the constants and their definitions.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues and solutions shared by other users.
  Documentation: Review the documentation for the specific module or program you are working with to understand the expected constants and their usage.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.