How To Fix CP407 - Operation number has already been assigned

CP407 - Overview

• Message type: E = Error

• Message class: CP - Task list messages: Core data

• Message number: 407

• Message text: Operation number has already been assigned

What causes this issue?

You have chosen an operation number that has already been assigned.

System Response

The reference to the work center operation set could not be created.

How to fix this error?

Choose another operation number.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CP407 - Operation number has already been assigned ?

  The SAP error message CP407, which states "Operation number has already been assigned," typically occurs in the context of production planning and control, particularly when dealing with routing and operations in a production order or a process order. This error indicates that the operation number you are trying to assign or modify has already been used in the system, which can lead to conflicts or inconsistencies in the production data.
  Causes:
  
  Duplicate Operation Assignment: The operation number you are trying to assign is already linked to another operation in the same routing or order.
  Routing Configuration: The routing for the material may already have the operation number defined, and you are attempting to assign it again.
  Data Entry Error: There may be a mistake in data entry where the same operation number is being entered multiple times.
  System 
  Configuration Issues: There could be issues with the configuration of the routing or production order that lead