How To Fix /SCMTMS/SCH172 - Schedule locked; your changes to &1 departures will be applied later

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCMTMS/SCH -

• Message number: 172

• Message text: Schedule locked; your changes to &1 departures will be applied later

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/SCH172 - Schedule locked; your changes to &1 departures will be applied later ?

  The SAP error message /SCMTMS/SCH172 Schedule locked; your changes to &1 departures will be applied later typically occurs in the context of SAP Transportation Management (TM) when there is an attempt to modify a schedule that is currently locked. This can happen for various reasons, such as:
  Cause:
  
  Concurrent Access: Another user or process is currently modifying the same schedule, which locks it to prevent conflicting changes.
  Background Jobs: A background job may be running that is processing the schedule, causing it to be locked.
  System Configuration: Certain configurations or settings in the system may lead to schedules being locked during specific operations.
  
  Solution:
  
  Wait and Retry: If the lock is temporary (e.g., due to another user), wait for a few moments and then try to apply your changes again.
  Check for Active Sessions: Use transaction codes like SM12 (to check for locks) or SM21 (to check system logs) to identify if another user or process is holding the lock.
  Identify Background Jobs: Check if there are any background jobs running that might be locking the schedule. You can use transaction SM37 to monitor background jobs.
  Contact Administrator: If you cannot identify the cause of the lock or if it persists, contact your SAP Basis or system administrator for assistance. They may need to release the lock or investigate further.
  Review Configuration: If this issue occurs frequently, it may be worth reviewing the system configuration and settings related to scheduling and locking mechanisms.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12, SM21, and SM37 for monitoring locks and background jobs.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search the SAP Support Portal for specific notes that might address this issue.
  Documentation: Review the SAP TM documentation for best practices on managing schedules and understanding locking mechanisms.
  
  By following these steps, you should be able to resolve the issue or at least identify the underlying cause of the schedule lock.