How To Fix GU771 - The calling application cannot be identified

SAP Error Message - Details

• Message type: E = Error

• Message class: GU - FI-SL utilities

• Message number: 771

• Message text: The calling application cannot be identified

What causes this issue?

The program cannot determine the calling application.

System Response

The system cancels processing.

How to fix this error?

Inform your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GU771 - The calling application cannot be identified ?

  The SAP error message GU771, which states "The calling application cannot be identified," typically occurs when there is an issue with the integration between SAP and an external application or system. This error can arise in various scenarios, such as when using SAP GUI, SAP Business Client, or when integrating with third-party applications.
  Causes:
  
  Missing or Incorrect Configuration: The integration settings between SAP and the calling application may not be configured correctly.
  Authorization Issues: The user may not have the necessary authorizations to access the calling application.
  Network Issues: There may be network connectivity problems that prevent the SAP system from communicating with the external application.
  Version Mismatch: There could be a compatibility issue between the versions of SAP and the calling application.
  Incorrect Parameters: The parameters passed from the calling application to SAP may be incorrect or incomplete.
  
  Solutions:
  
  Check Configuration: Review the configuration settings for the integration between SAP and the calling application. Ensure that all necessary parameters are correctly set.
  Verify Authorizations: Ensure that the user has the appropriate authorizations to access the calling application and perform the required actions in SAP.
  Network Troubleshooting: Check the network connectivity between the SAP system and the external application. Ensure that firewalls or other network security measures are not blocking the connection.
  Update Software: Ensure that both SAP and the calling application are updated to compatible versions. Check for any patches or updates that may resolve compatibility issues.
  Review Logs: Check the SAP system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  Contact Support: If the issue persists, consider reaching out to SAP support or the support team for the external application for further assistance.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the documentation for both SAP and the external application to ensure that all integration requirements are met.
  Community Forums: Check SAP Community forums or other online resources where similar issues may have been discussed and resolved by other users.
  
  By following these steps, you should be able to identify the root cause of the GU771 error and implement a suitable solution.