How To Fix DU201 - Interface for function module & could not be created

DU201 - Overview

• Message type: E = Error

• Message class: DU - Data transfer to SAP-EIS

• Message number: 201

• Message text: Interface for function module & could not be created

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.

DU201 - Details

• The SAP error message DU201 indicates that there is an issue with the creation of an interface for a function module. This error typically arises during the development or modification of function modules in the ABAP environment. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Naming Conflicts: The function module name may conflict with existing objects or naming conventions in the system.
  Syntax Errors: There may be syntax errors in the function module code that prevent the interface from being generated.
  Missing Components: Required components or parameters for the function module may be missing or incorrectly defined.
  Transport Issues: If the function module is being transported from one system to another, there may be issues with the transport request.
  Authorization Issues: The user may not have the necessary authorizations to create or modify function modules.
  
  Solutions:
  
  Check Naming Conventions: Ensure that the function module name adheres to SAP naming conventions and does not