How To Fix DO647 - & .. Start attempt for task & after return from another task

SAP Error Message - Details

• Message type: E = Error

• Message class: DO - Dictionary: Mass activation of domains and data elements

• Message number: 647

• Message text: & .. Start attempt for task & after return from another task

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 DO647 - & .. Start attempt for task & after return from another task ?

  The SAP error message DO647, which states "Start attempt for task & after return from another task," typically occurs in the context of background processing or when dealing with asynchronous tasks in SAP systems. This error indicates that there is an issue with the task scheduling or execution flow, particularly when a task is trying to start while another task is still in progress or has not completed properly.
  Causes:
  
  Task Overlap: The error can occur if a task is attempted to be started while another task is still running or has not returned to a state where it can accept new tasks.
  Configuration Issues: There may be configuration issues in the background job scheduling or in the task management settings.
  Resource Constraints: Insufficient system resources (like memory or processing power) can lead to tasks not completing in a timely manner, causing overlaps.
  Deadlocks: If there are deadlocks in the system, it can prevent tasks from completing, leading to this error.
  Programming Errors: Custom code or enhancements that manage task execution may have logical errors that lead to improper task handling.
  
  Solutions:
  
  Check Task Status: Review the status of the tasks in the background processing system (transaction SM37) to see if there are any stuck or long-running tasks that need to be addressed.
  Adjust Scheduling: If tasks are scheduled too closely together, consider adjusting the scheduling to allow more time between task executions.
  Review Configuration: Check the configuration settings for background jobs and task management to ensure they are set up correctly.
  Monitor System Resources: Use transaction ST02 (buffer management) and ST06 (OS monitoring) to check for resource bottlenecks and address any issues.
  Debug Custom Code: If the error is related to custom code, debug the relevant programs to identify any logical errors or issues in task management.
  Check for Deadlocks: Use transaction SM21 (system log) to check for any deadlocks or critical errors that may be affecting task execution.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (Job Monitoring), SM21 (System Log), ST22 (Dump Analysis), and ST06 (OS Monitoring).
  SAP Notes: Search for SAP Notes related to DO647 for any specific patches or updates that may address known issues.
  Documentation: Review SAP documentation on background processing and task management for best practices and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with SAP support or your internal SAP Basis team for further assistance.