How To Fix /SCMTMS/SCH_UPLOAD303 - Error while starting parallel task &1; &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMTMS/SCH_UPLOAD -

• Message number: 303

• Message text: Error while starting parallel task &1; &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCMTMS/SCH_UPLOAD303 - Error while starting parallel task &1; &2 ?

  The SAP error message /SCMTMS/SCH_UPLOAD303 typically occurs in the context of SAP Transportation Management System (TMS) when there is an issue with starting a parallel task. This error can arise due to various reasons, including configuration issues, resource limitations, or problems with the data being processed.
  Causes:
  
  Resource Limitations: The system may not have enough resources (like memory or processing power) to start the parallel task.
  Configuration Issues: There may be incorrect settings in the TMS configuration that prevent the task from starting.
  Data Issues: The data being processed may have inconsistencies or errors that prevent the task from executing properly.
  Locking Issues: Another process may be holding a lock on the resources needed for the parallel task.
  System Performance: High system load or performance issues can also lead to this error.
  
  Solutions:
  
  Check System Resources: Monitor the system's resource usage (CPU, memory) and ensure that there are enough resources available to start the task.
  Review Configuration: Verify the configuration settings in the TMS to ensure they are correct. This includes checking the settings for parallel processing.
  Data Validation: Check the data being processed for any inconsistencies or errors. Ensure that all required data is available and correctly formatted.
  Lock Management: Use transaction codes like SM12 to check for locks on the relevant tables or objects. If necessary, release any locks that are preventing the task from starting.
  System Performance Monitoring: Use transaction codes like ST03N or ST06 to monitor system performance and identify any bottlenecks that may be affecting task execution.
  Increase Parallel Processing Limits: If applicable, consider increasing the limits for parallel processing in the TMS configuration.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (to check job logs), SM12 (to check locks), and ST22 (to check dumps).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for TMS to understand the configuration and operational guidelines better.
  
  If the issue 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.