How To Fix BT456 - Job '&'/'&': Communication error (server: &)

SAP Error Message - Details

• Message type: E = Error

• Message class: BT - Background processing messages

• Message number: 456

• Message text: Job '&'/'&': Communication error (server: &)

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 BT456 - Job '&'/'&': Communication error (server: &) ?

  The SAP error message BT456 typically indicates a communication error related to a background job. The message format suggests that there is an issue with the job identified by the job name and the server it was supposed to run on. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the application server and the database server or between different application servers.
  Server Unavailability: The server specified in the error message may be down or not reachable due to maintenance or other issues.
  Resource Limitations: The server may be overloaded or running out of resources (CPU, memory, etc.), causing it to fail to process the job.
  Configuration Issues: There may be misconfigurations in the job scheduling or in the communication settings between servers.
  Authorization Issues: The user or system account running the job may not have the necessary permissions to execute the job on the specified server.
  
  Solutions:
  
  Check Server Status: Verify that the server mentioned in the error message is up and running. You can do this by checking the SAP system status or using transaction codes like SM51 (to check active servers).
  Network Connectivity: Ensure that there are no network issues. You can use tools like ping or traceroute to check connectivity between servers.
  Review Job Logs: Check the job logs for more detailed error messages. You can do this using transaction code SM37 to find the job and review its logs.
  Resource Monitoring: Monitor the server's resource usage to see if it is overloaded. You can use transaction codes like ST03N or ST06 for performance monitoring.
  Configuration Review: Review the configuration settings for the job and the communication settings between servers. Ensure that they are correctly set up.
  Authorization Check: Verify that the user or system account has the necessary authorizations to execute the job. You can check this in transaction SU53 or SU01.
  Retry the Job: If the issue was temporary, you might simply retry the job after addressing any identified issues.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM37: To monitor background jobs.
  SM51: To check active application servers.
  ST22: To check for dumps that may provide more context.
  ST03N: To analyze performance and workload.
  SU53: To check authorization issues.
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Documentation: Review SAP documentation related to background job processing and communication errors for more insights.
  
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.