How To Fix VMP_MSG161 - Action cannot be performed; assembly header has same material

VMP_MSG161 - Overview

• Message type: E = Error

• Message class: VMP_MSG - VMP Message Manager

• Message number: 161

• Message text: Action cannot be performed; assembly header has same material

Self-Explanatory Message

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.

What else can you do?

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message VMP_MSG161 - Action cannot be performed; assembly header has same material ?

  The SAP error message VMP_MSG161 indicates that an action cannot be performed because the assembly header has the same material. This typically occurs in the context of production planning or assembly processes where the system is trying to create or modify a production order or assembly that involves materials that are not allowed to be duplicated in the same context.
  
  Cause:
  The error is usually caused by one of the following reasons:
  
  Duplicate Material Assignment: The assembly header is trying to reference the same material multiple times, which is not allowed in the context of the operation being performed.
  
  Configuration Issues: There may be configuration settings in the material master or production order that prevent the same material from being used in the same assembly.
  Data Integrity Issues: There could be inconsistencies in the data that lead to the system interpreting the same material as being assigned multiple times.
  
  
  Solution:
  To resolve the error, you can take