How To Fix DO646 - & .. Start attempt for task & after & seconds

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 646

• Message text: & .. Start attempt for task & after & seconds

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 DO646 - & .. Start attempt for task & after & seconds ?

  The SAP error message DO646 typically indicates that a task has failed to start within a specified time limit. The message usually appears in the context of background processing or job scheduling in SAP systems. The error message format is generally as follows:
  DO646: Start attempt for task & after & seconds
  Cause:
  
  Resource Availability: The system may not have enough resources (CPU, memory, etc.) to start the task.
  Job Scheduling Conflicts: There may be conflicts with other jobs that are running at the same time, leading to delays.
  Configuration Issues: Incorrect configuration settings in the background processing or job scheduling parameters.
  Database Locks: The task may be waiting for a database lock to be released, which can cause delays.
  Long-running Previous Jobs: If a previous job is taking longer than expected, it can delay the start of subsequent jobs.
  
  Solution:
  
  Check System Resources: Monitor the system's CPU and memory usage to ensure there are enough resources available. You can use transaction codes like SM50 (for process overview) and ST06 (for operating system monitoring).
  Review Job Scheduling: Use transaction SM37 to check the status of background jobs. Look for any jobs that are running longer than expected or are in a waiting state.
  Adjust Job Parameters: If necessary, adjust the job scheduling parameters to allow for more concurrent jobs or to prioritize certain jobs.
  Database Monitoring: Use transaction SM12 to check for any database locks that might be causing delays. If locks are found, investigate and resolve them.
  Increase Timeout Settings: If the issue persists, consider increasing the timeout settings for background jobs in the system configuration.
  Check Logs: Review the system logs (transaction SM21) for any related error messages that might provide additional context.
  
  Related Information:
  
  
  Transaction Codes:
  
  SM37: Monitor background jobs.
  SM50: Process overview.
  SM12: Check for database locks.
  ST22: Dump analysis (if applicable).
  SM21: System log.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Review SAP documentation for background processing and job scheduling for best practices and configuration guidelines.
  
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.