How To Fix SRT_CORE255 - Wait for Scheduler

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_CORE - Nachrichtenklasse für SOAP Runtime

• Message number: 255

• Message text: Wait for Scheduler

What causes this issue?

The bgRFC cannot process this message for some reasons (i.e. not enough
system resources or wrong configuration).

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Ask your system administrators to check the bgRFC configuration
(transaction SBGRFCCONF) and also the system resources (Dialog work
processes).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SRT_CORE255 - Wait for Scheduler ?

  The SAP error message SRT_CORE255: Wait for Scheduler typically occurs in the context of SAP Process Integration (PI) or SAP Process Orchestration (PO) when there is an issue with the scheduling of asynchronous messages or processes. This error indicates that the system is waiting for a scheduler to process a task, but it is not able to do so for some reason.
  Causes:
  
  Scheduler Not Running: The scheduler responsible for processing the messages may not be running or may have encountered an error.
  Resource Constraints: There may be insufficient resources (CPU, memory, etc.) on the server, causing delays in processing.
  Configuration Issues: Incorrect configuration settings in the integration scenario or in the scheduler settings.
  High Load: The system may be under heavy load, causing delays in processing tasks.
  Deadlocks: There may be deadlocks or contention issues in the database or application layer that prevent the scheduler from executing tasks.
  
  Solutions:
  
  Check Scheduler Status: Verify that the scheduler is running. You can do this by checking the relevant transaction codes in SAP (e.g., SXMB_MONI for monitoring messages).
  Restart Scheduler: If the scheduler is not running, restart it. This can often resolve temporary issues.
  Monitor System Resources: Check the system's CPU and memory usage. If resources are constrained, consider optimizing the system or scaling up resources.
  Review Configuration: Ensure that the configuration settings for the integration scenario and the scheduler are correct. Look for any misconfigurations that could be causing the issue.
  Check Logs: Review the application and system logs for any errors or warnings that could provide more context about the issue.
  Increase Timeout Settings: If the system is under heavy load, consider increasing timeout settings for the scheduler to allow more time for processing.
  Database Optimization: If deadlocks are suspected, analyze the database for performance issues and optimize queries or indexes as necessary.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SXMB_MONI, SRT_MONI, or SRT_UTIL to monitor and troubleshoot integration issues.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message. SAP frequently updates its knowledge base with solutions for common problems.
  Performance Tuning: Consider performance tuning for your SAP PI/PO environment to handle higher loads more effectively.
  Documentation: Refer to the official SAP documentation for Process Integration and Process Orchestration for best practices and troubleshooting guidelines.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.