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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

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  • 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.



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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 Web Dynpro does not know how to process.
    • When you activate or generate the Web Dynpro component, the system issues this warning.

    Solution:

    1. Check the Data Type:

      • Identify the unknown type (&2) mentioned in the message.
      • Verify if this type is a standard ABAP type, a custom type (e.g., a structure, table type, or domain), or an external type.
    2. Ensure Type Activation:

      • If it is a custom type, make sure it is activated in the ABAP Dictionary.
      • If the type is part of a transport request, ensure it has been imported into the system.
    3. Use Supported Types:

      • Web Dynpro supports a subset of ABAP data types. Complex or unsupported types (e.g., deep structures, certain table types) may cause this warning.
      • Replace unsupported types with supported ones, or simplify the interface parameters.
    4. Check Interface Definition:

      • Review the interface (&1) in the Web Dynpro component.
      • Adjust the parameter or attribute types to standard or supported types.
    5. Regenerate and Activate:

      • After corrections, regenerate and activate the Web Dynpro component.
      • The warning should disappear if all types are recognized.
    6. Consult SAP Notes:

      • Sometimes, specific SAP Notes address issues with certain data types in Web Dynpro.
      • Search SAP Support Portal for notes related to WXP628 or Web Dynpro data types.

    Additional Information:

    • Message Class: WXP (Web Dynpro ABAP)
    • Message Number: 628
    • Message Type: Warning (W)
    • This warning does not necessarily stop the activation but indicates potential runtime issues.
    • Ignoring this warning may lead to runtime errors or unexpected behavior in the Web Dynpro application.

    Summary:

    Aspect Details
    Cause Unknown or unsupported data type in Web Dynpro interface.
    Effect Warning during activation/generation; potential runtime issues.
    Solution Verify and replace unsupported types; activate all custom types; regenerate component.
    Related Check SAP Notes, Web Dynpro ABAP documentation on supported data types.

    If you provide the exact interface name and the unknown type, I can help you identify the problematic data type more precisely.

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