How To Fix OC731 - Start time is not changeable. Change back to &, delete and recreate entry

SAP Error Message - Details

• Message type: E = Error

• Message class: OC - IS-Oil: BDRP Bulk Distribution Requirement Planning messages

• Message number: 731

• Message text: Start time is not changeable. Change back to &, delete and recreate entry

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message OC731 - Start time is not changeable. Change back to &, delete and recreate entry ?

  The SAP error message OC731, which states "Start time is not changeable. Change back to &, delete and recreate entry," typically occurs in the context of scheduling or planning activities within SAP, particularly in modules like SAP Project System (PS) or SAP Production Planning (PP). This error indicates that the start time of a particular activity or task cannot be modified due to certain constraints or settings.
  Causes:
  
  Locked Status: The activity or task may be in a status that does not allow changes. For example, if the task is already in progress or completed, the start time may be locked.
  Dependencies: There may be dependencies or relationships with other tasks that prevent changes to the start time.
  Planning Parameters: Certain planning parameters or settings may restrict changes to the start time.
  Data Integrity: The system may have integrity checks that prevent changes to ensure that the overall project or production schedule remains consistent.
  
  Solutions:
  
  Check Status: Verify the status of the activity or task. If it is completed or in progress, you may need to change its status back to a modifiable state (e.g., "Not Started").
  Delete and Recreate: If the start time needs to be changed and the system does not allow it, you may need to delete the existing entry and recreate it with the desired start time.
  Review Dependencies: Check for any dependencies or relationships with other tasks that may be causing the restriction. Adjust these dependencies if necessary.
  Consult Documentation: Review the relevant SAP documentation or configuration settings to understand any specific restrictions that may apply to your scenario.
  User Permissions: Ensure that you have the necessary permissions to make changes to the task or activity.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or CO02 (Change Production Order) where this error might occur.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By following these steps, you should be able to address the OC731 error and make the necessary adjustments to your project or production scheduling.