How To Fix EP801 - Unknown exception while calling up message handler

SAP Error Message - Details

• Message type: E = Error

• Message class: EP - Messages for Posting Area

• Message number: 801

• Message text: Unknown exception while calling up message handler

What causes this issue?

An unknown exception occurred while calling up the message handler.

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 EP801 - Unknown exception while calling up message handler ?

  The SAP error message "EP801 Unknown exception while calling up message handler" typically indicates that there is an issue with the message handling in the SAP system, which can be caused by various factors. Here are some potential causes, solutions, and related information for this error:
  Causes:
  
  
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to this error. This may include issues with the message handler settings or related components.
  
  
  System Bugs: There may be bugs in the SAP software or specific patches that have not been applied, leading to unexpected behavior.
  
  
  Authorization Problems: Insufficient authorizations for the user or the system components involved in the message handling process can trigger this error.
  
  
  Network Issues: Problems with network connectivity or communication between different SAP components can also result in this error.
  
  
  Data Corruption: Corrupted data in the database or inconsistencies in the application data can lead to exceptions being thrown.
  
  
  Solutions:
  
  
  Check Configuration: Review the configuration settings related to the message handler. Ensure that all necessary parameters are correctly set.
  
  
  Apply Patches: Check for any available patches or updates from SAP that address known issues related to the message handler. Apply these updates as necessary.
  
  
  Review Authorizations: Ensure that the user has the necessary authorizations to perform the actions that are leading to the error. You may need to consult with your SAP security team.
  
  
  Check Logs: Review the system logs (transaction codes like SLG1 for application logs) for more detailed error messages that can provide insights into the root cause of the issue.
  
  
  Test Network Connectivity: Ensure that there are no network issues affecting communication between SAP components. You can use tools like ping or traceroute to diagnose connectivity problems.
  
  
  Data Consistency Check: Run consistency checks on the relevant data to ensure that there are no corrupt entries. This may involve using transaction codes like SE11 or SE14 to check database tables.
  
  
  Contact SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any logs or screenshots.
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide guidance on troubleshooting.
  Community Forums: Check SAP Community forums or other online resources where similar issues may have been discussed.
  Documentation: Review the official SAP documentation for the specific module or component you are working with, as it may contain troubleshooting steps or best practices.
  
  By following these steps, you should be able to identify and resolve the underlying issue causing the "EP801 Unknown exception while calling up message handler" error in your SAP system.