How To Fix WXP628 - Unknown type '&2' for interface &1

SAP Error Message - Details

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 628

• Message text: Unknown type '&2' for interface &1

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 WXP628 - Unknown type '&2' for interface &1 ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WXP628 Unknown type '&2' for interface &1
  
  
  Cause:
  This warning message occurs during the generation or activation of Web Dynpro components (e.g., Web Dynpro ABAP interfaces or components). The message indicates that the Web Dynpro framework encountered an unknown or unsupported data type (&2) used in the interface (&1).
  In other words, the interface definition includes a data type that the Web Dynpro runtime or generator does not recognize or cannot handle. This often happens if:
  
  The interface uses a custom or complex data type that is not supported by Web Dynpro.
  The data type is defined in an external or non-standard namespace.
  There is a mismatch or inconsistency in the data type definitions.
  The interface references a type that is not yet activated or transported properly.
  
  
  Typical Scenario:
  
  You create or modify a Web Dynpro interface and assign a parameter or attribute with a data type that