How To Fix CN085 - You can only perform the method 'Save' once

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 085

• Message text: You can only perform the method 'Save' once

What causes this issue?

The 'Save' method has been called up several times.

System Response

The 'Save' method is only executed once, during which all changes to
data are saved using methods.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN085 - You can only perform the method 'Save' once ?

  The SAP error message CN085, which states "You can only perform the method 'Save' once," typically occurs in the context of the SAP Project System (PS) or related modules when there is an attempt to save a project or a related object multiple times in a single session or transaction. This error can arise due to various reasons, including:
  Causes:
  
  Multiple Save Attempts: The most common cause is that the user or the system is trying to save the same object more than once in a single transaction.
  Session Issues: If there are multiple sessions open for the same object, it can lead to conflicts and this error.
  Custom Code or Enhancements: If there are custom programs, user exits, or enhancements that trigger a save operation multiple times, it can lead to this error.
  Locking Issues: If the object is locked by another user or process, it may prevent saving and lead to this error message.
  
  Solutions:
  
  Check for Multiple Saves: Ensure that you are not inadvertently trying to save the same object multiple times. Review your actions before saving.
  Close Other Sessions: If you have multiple sessions open for the same object, close the other sessions and try saving again.
  Review Custom Code: If you have custom code or enhancements, review them to ensure they are not causing multiple save attempts. Debugging may be necessary to identify the issue.
  Check for Locks: Use transaction codes like SM12 to check for locks on the object you are trying to save. If another user has locked it, you may need to wait until they release the lock.
  Restart the Transaction: Sometimes, simply exiting the transaction and starting over can resolve the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN22 (for project management) or CJ20N (for project planning) where this error might occur.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  User Documentation: Review SAP documentation or user manuals for best practices in managing projects and saving data to avoid this error in the future.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or technical team for further investigation.