How To Fix IP437 - Function not possible as scheduling currently locked

SAP Error Message - Details

• Message type: E = Error

• Message class: IP - Messages for preventive maintenance

• Message number: 437

• Message text: Function not possible as scheduling currently locked

What causes this issue?

You have tried to perform a scheduling function. This is not possible
because in the meantime the <GL:maintenance_plan>maintenance plan</>
has received the status <LS>Inactive</> or <LS>Deletion flag</>.

System Response

INCLUDE 'KEINE-FUNKTION' OBJECT DOKU ID TX LANGUAGE EN

How to fix this error?

If you still want to perform the function, you must first activate the
maintenance plan or reset the deletion flag.
To do this, proceed as follows:
Leave the <GL:transaction>transaction</> and go into the change mode in
the maintenance plan.
Activate the maintenance plan or reset the deletion flag.
Save the change.
RESET N1
The maintenance plan can then be scheduled again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IP437 - Function not possible as scheduling currently locked ?

  The SAP error message IP437, which states "Function not possible as scheduling currently locked," typically occurs in the context of production planning and scheduling within the SAP system. This error indicates that the scheduling function you are trying to execute is currently locked, preventing any changes or updates to the scheduling data.
  Causes:
  
  Locking Mechanism: The scheduling process may be locked due to another user or process currently accessing or modifying the scheduling data. This is a common scenario in multi-user environments.
  Background Jobs: A background job that is currently running may be holding a lock on the scheduling data.
  Transaction in Progress: If a transaction related to scheduling is still in progress, it can lead to this error.
  System Configuration: Certain configurations or settings in the SAP system may inadvertently lead to locking issues.
  
  Solutions:
  
  Wait and Retry: If the lock is temporary (e.g., due to another user), waiting for a few moments and then retrying the operation may resolve the issue.
  Check for Active Sessions: Use transaction code SM12 to check for any active locks. You can identify the user or process that is holding the lock and take appropriate action (e.g., contacting the user or waiting for their process to complete).
  Review Background Jobs: Use transaction code SM37 to check for any background jobs that may be running and holding locks. If necessary, you can cancel the job if it is safe to do so.
  System Logs: Check the system logs (transaction code SM21) for any related messages that might provide additional context about the locking issue.
  Consult with Basis Team: If the issue persists, it may be necessary to involve your SAP Basis team to investigate further, as they can analyze system performance and locking behavior.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage locks.
  SM37: Monitor background jobs.
  SM21: View system logs.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. You can search the SAP Support Portal for relevant notes.
  Documentation: Review SAP documentation related to production planning and scheduling to understand the locking mechanisms in place.
  
  By following these steps, you should be able to identify the cause of the IP437 error and take appropriate action to resolve it.