How To Fix C1066 - Class is being processed by another user

C1066 - Overview

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 066

• Message text: Class is being processed by another user

What causes this issue?

You want to edit the allocation to a class. This activity requires that
the class is not changed in the meantime. However, another user is
currently editing the class or allocations to the class.

How to fix this error?

Try again later.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1066 - Class is being processed by another user ?

  The SAP error message C1066, which states "Class is being processed by another user," typically occurs when a user attempts to access or modify a class (such as a method or function module) that is currently being edited or locked by another user. This is a common issue in environments where multiple users are working on the same development objects.
  
  Cause:
  
  Lock Mechanism: SAP uses a locking mechanism to prevent simultaneous changes to the same object. If one user is editing a class, the system locks it to prevent other users from making changes until the first user has finished.
  Long Running Transactions: If a user has left a transaction open for an extended period, it can lead to locks that prevent others from accessing the object.
  Transport Requests: If the class is part of a transport request that is being processed, it may also be locked for changes.
  
  
  Solution:
  
  Wait for Release: The simplest solution