How To Fix 29722 - A BOM already exists for class/usage

SAP Error Message - Details

• Message type: E = Error

• Message class: 29 - Bills of Material

• Message number: 722

• Message text: A BOM already exists for class/usage

What causes this issue?

You receive this message in one of the following situations:
You want to enter the class that has already been specified as a
variant in an existing BOM (-> variant BOM).
This is only possible for classes that, as yet, have <ZH>no</> BOM.
However, a BOM with the entered usage exists for the entered class.
&What_TO_DO&
Please check your entries for the class, class type and BOM usage.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 29722 - A BOM already exists for class/usage ?

  The SAP error message 29722, which states "A BOM already exists for class/usage," typically occurs when you are trying to create a Bill of Materials (BOM) for a material that already has an existing BOM for the specified class and usage combination. This is a common issue in SAP when managing BOMs, especially in industries where multiple BOMs may be associated with a single material.
  Cause:
  
  Existing BOM: The primary cause of this error is that there is already a BOM defined for the material in question with the same BOM usage and BOM category.
  Incorrect Data Entry: Sometimes, the error can arise from incorrect data entry, where the user may not be aware that a BOM already exists for the specified parameters.
  Configuration Issues: There may be configuration settings in the system that prevent the creation of multiple BOMs for the same class/usage.
  
  Solution:
  
  Check Existing BOMs: Before attempting to create a new BOM, check if a BOM already exists for the material. You can do this by using transaction codes like CS03 (Display BOM) or CS12 (BOM Level Display) to view existing BOMs.
  Modify Existing BOM: If a BOM already exists and you need to make changes, consider modifying the existing BOM instead of creating a new one. You can use transaction code CS02 (Change BOM) to make necessary adjustments.
  Use Different Usage: If you need to create a new BOM for a different purpose, consider using a different BOM usage. BOM usage defines the context in which the BOM is used (e.g., production, engineering, etc.).
  Delete Existing BOM: If the existing BOM is no longer needed, you can delete it using transaction code CS02 (Change BOM) and then create a new one. Be cautious with this approach, as it may affect other processes.
  Consult Documentation: Review SAP documentation or consult with your SAP administrator for specific configurations related to BOMs in your system.
  
  Related Information:
  
  BOM Usage: BOM usage is a key concept in SAP that allows you to define different BOMs for the same material based on different contexts (e.g., production, sales, engineering).
  BOM Categories: Different categories of BOMs (e.g., standard BOM, variant BOM) may have different rules regarding their creation and management.
  Transaction Codes: Familiarize yourself with relevant transaction codes for BOM management, such as:
  
  CS01: Create BOM
  CS02: Change BOM
  CS03: Display BOM
  CS12: BOM Level Display
  CS11: BOM Item Display
  
  
  
  By following these steps and understanding the underlying concepts, you should be able to resolve the error and manage BOMs effectively in SAP.