How To Fix CU405 - Class & cannot have a BOM

CU405 - Overview

• Message type: E = Error

• Message class: CU - Variants / configuration messages

• Message number: 405

• Message text: Class & cannot have a BOM

What causes this issue?

In a dependency, you have referred to a BOM for an object, but the
object is only known as a class (so it does not yet refer to a specific
material). This data is not sufficient to determine a BOM for the
object.

System Response

Download error.

How to fix this error?

For more information on the error environment, see the application log.
Check the dependency.
References to materials in constraints and rules are formulated with
<ZH>IS_OBJECT</> instead of <ZH>IS_A</>.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CU405 - Class & cannot have a BOM ?

  The SAP error message CU405 indicates that a specific class (in this case, a class represented by the placeholder "&") cannot have a Bill of Materials (BOM) associated with it. This error typically arises in the context of Product Data Management (PDM) or when working with Material Management (MM) and Production Planning (PP) modules in SAP.
  
  Cause:
  
  Class Type Restrictions: The class you are trying to associate with a BOM may be of a type that does not support BOMs. In SAP, certain class types are designated for specific purposes and may not allow BOMs.
  Incorrect Configuration: The configuration of the class may not allow for BOM assignment. This could be due to settings in the class type or the characteristics defined within the class.
  Material Type Limitations: The material type associated with the class may not be compatible with BOMs. Some material types are not designed to have BOMs.
  Missing Authorizations: Sometimes, the user