Message type: E = Error
Message class:  VCH_HL_LOVC2AVC_MVAR - Messages of LO-VC to AVC Material Variants switch 
Message number: 004
Message text: Material variants converted
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message VCH_HL_LOVC2AVC_MVAR004 typically relates to issues with material variants in the context of variant configuration. This error can occur during processes such as sales order processing, production order creation, or when trying to convert material variants.
Cause: The error message indicates that there is a problem with the conversion of material variants. This can happen due to several reasons, including: Missing Configuration: The material variant may not have the necessary configuration settings or characteristics defined in the system. Inconsistent Data: There may be inconsistencies in the data related to the material variant, such as missing master data or incorrect settings in the variant configuration profiles. Incorrect Dependencies: The dependencies defined for the material variant may not be satisfied, leading to issues during the conversion process. Authorization Issues: The user may not have the necessary authorizations to perform the conversion of material variants.
Solution: To resolve the error, you can take the following steps: Check Material Variant
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
VCH_HL_LOVC2AVC_MVAR003 Select At least one valid material variant
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
VCH_HL_LOVC2AVC_MVAR002 Variant &1 with profile &2 and target &3 configurations are not equal
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
VCH_HL_LOVC2AVC_MVAR005 Material variant updated
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
VCH_HL_LOVC2AVC_MVAR006 No documentation available
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.