How To Fix MW400 - Function cannot be performed

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 400

• Message text: Function cannot be performed

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 MW400 - Function cannot be performed ?

  The SAP error message MW400 ("Function cannot be performed") typically occurs in the context of inventory management or material movements. This error can arise due to various reasons, and understanding the context in which it appears is crucial for troubleshooting. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Material Status: The material may have a status that prevents certain functions, such as being blocked for movement or being marked for deletion.
  Stock Type: The stock type of the material (e.g., unrestricted, quality inspection, blocked) may not allow the operation you are trying to perform.
  Document Status: The document you are trying to process may be in a status that does not allow further actions (e.g., already posted, canceled).
  Authorization Issues: The user may not have the necessary authorizations to perform the action.
  
  Configuration Issues: There may be configuration settings in the system that restrict certain functions based on business rules or processes.
  System Errors: