How To Fix CNV127 - Activity can only be opened in read-only mode

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 127

• Message text: Activity can only be opened in read-only mode

What causes this issue?

You cannot execute this activity, as certain prerequisites have not been
met. For example, predecessor activities may be required, or the current
phase may be different to the phase to which this activity belongs.
You can open the activity in read-only mode, but you cannot make any
changes.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV127 - Activity can only be opened in read-only mode ?

  The SAP error message CNV127 ("Activity can only be opened in read-only mode") typically occurs in the context of SAP's data migration or conversion tools, particularly when using the SAP S/4HANA Migration Cockpit or other related tools. This error indicates that the activity you are trying to access is currently locked for editing, and you can only view it in read-only mode.
  Causes:
  
  Activity Locking: The activity you are trying to access may be locked by another user or process. This can happen if someone else is currently working on the same activity or if the system has locked it for some reason.
  User Permissions: Your user role may not have the necessary permissions to edit the activity. You might only have read access.
  System Configuration: The system might be configured to allow only read access to certain activities to prevent unintentional changes during critical processes.
  Technical Issues: There could be underlying technical issues or bugs in the system that are causing the activity to be locked.
  
  Solutions:
  
  Check for Locks: Verify if another user is currently editing the activity. You can use transaction codes like SM12 to check for locks in the system.
  User Permissions: Ensure that your user role has the necessary permissions to edit the activity. You may need to contact your SAP administrator to adjust your permissions.
  Log Out and Log In: Sometimes, simply logging out of the system and logging back in can resolve temporary locking issues.
  Wait and Retry: If the activity is locked by another user, you may need to wait until they finish their work and release the lock.
  Contact Support: If the issue persists and you suspect it might be a technical problem, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to check for locks) and SU53 (to analyze authorization issues).
  SAP Notes: Check SAP Notes for any known issues related to the CNV127 error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review the official SAP documentation for the specific migration or conversion tool you are using, as it may provide additional context or troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the CNV127 error and take appropriate action to resolve it.