How To Fix O3342 - Change of conversion group changes the product type

SAP Error Message - Details

• Message type: E = Error

• Message class: O3 - IS-Oil: HPM messages (goods movements, QCI, deliveries)

• Message number: 342

• Message text: Change of conversion group changes the product type

What causes this issue?

You attempt to change the conversion group of the material. The product
types of the old and new conversion group are different.

System Response

The system issues this warning message. You can continue processing.

How to fix this error?

Make sure that the change of the conversion group makes sense.
Example:
A change from product type 2 "Oil products (gasoline, diesel, etc.)" to
5 "Asphalt" may be meaningful, since with release 4.6B new conversion
groups for asphalt have been delivered.
A change from product type 1 "Crude oil" to product type 6 "Natural
gas" does not appear to make any sense and may lead to errors when
goods movements are posted.

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 O3342 - Change of conversion group changes the product type ?

  The SAP error message O3342, which states "Change of conversion group changes the product type," typically occurs in the context of material master data management, particularly when dealing with the conversion of units of measure or product types in SAP.
  Cause:
  This error usually arises when there is an attempt to change the conversion group of a material that would result in a change of its product type. The product type in SAP is a classification that determines how a material is treated in various processes, such as inventory management, sales, and production. Changing the conversion group can affect how the system interprets the material's characteristics, leading to inconsistencies.
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review the Material Master Data: Check the material master data for the product in question. Ensure that the conversion group you are trying to assign is appropriate for the current product type.
  
  
  Check Product Type Compatibility: Verify that the new conversion group is compatible with the existing product type. If the conversion group is intended for a different product type, you may need to change the product type first or choose a different conversion group.
  
  
  Use the Correct Transaction: If you are using a transaction to change the conversion group, ensure that you are using the correct transaction code (e.g., MM02 for changing material master data) and that you are following the correct procedure.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on conversion groups and product types. This can provide insights into the rules governing these changes.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  
  Related Information:
  
  Material Master Data: Understanding the structure and fields in the material master is crucial. Familiarize yourself with the relevant views (e.g., Basic Data, Sales, Purchasing) and how they interact.
  Conversion Groups: Learn about the purpose of conversion groups in SAP and how they are used to manage different units of measure for the same material.
  Product Types: Understand the different product types available in your SAP system and their implications for material management processes.
  
  By following these steps and understanding the underlying concepts, you should be able to address the O3342 error effectively.