How To Fix GP406 - Class & not defined, can be created

GP406 - Overview

• Message type: E = Error

• Message class: GP - FI-SL and CO planning

• Message number: 406

• Message text: Class & not defined, can be created

What causes this issue?

You want to assign the planning parameters to class &V1&. However,
this class is currently not defined.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Ignore the warning and create the new class &V1&, or
Display the possible classes with F4, or
Correct your typing error.

Error message extract from SAP system. Copyright SAP SE.

GP406 - Details

• The SAP error message GP406 ("Class & not defined, can be created") typically occurs in the context of SAP's classification system, particularly when working with the SAP General Product Data Management (GP) module. This error indicates that the system is unable to find a specific class that is required for a particular operation, such as creating or managing a product or material.
  
  Cause:
  
  Missing Class Definition: The class that you are trying to use has not been defined in the system.
  Incorrect Class Type: The class type may not be correctly set or may not exist in the system.
  Authorization Issues: The user may not have the necessary permissions to access or create the class.
  
  Configuration Issues: There may be issues with the configuration of the classification system in SAP.
  
  
  Solution:
  
  
  Create the Class:
  
  Navigate to the transaction code CL02 (Change Class) or CL01 (Create Class).
  Check if the class you are trying to use exists. If it does