How To Fix /IWBEP/CM_V4_MED128 - Type information for property '&1' already assigned by structure

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 128

• Message text: Type information for property '&1' already assigned by structure

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 /IWBEP/CM_V4_MED128 - Type information for property '&1' already assigned by structure ?

  The SAP error message /IWBEP/CM_V4_MED128 indicates that there is a conflict in the type information for a property in an OData service. Specifically, it means that the type information for the property (represented by &1) has already been assigned by a structure, and there is an attempt to assign it again, which is not allowed.
  Cause:
  
  Duplicate Type Assignment: The property in question is likely defined in multiple places or is being redefined in a way that conflicts with its original definition.
  Model Definition Issues: There may be inconsistencies in the data model definitions, such as conflicting data types or structures being used for the same property.
  Service Implementation Errors: Errors in the implementation of the OData service, such as incorrect annotations or misconfigured entity types.
  
  Solution:
  
  Check Data Model: Review the data model definitions in the OData service. Ensure that the property is defined only once and that its type is consistent across all usages.
  Remove Duplicates: If the property is defined in multiple structures or entity types, remove the duplicate definitions or ensure that they are consistent.
  Adjust Annotations: If you are using annotations, verify that they are correctly applied and do not conflict with the existing type definitions.
  Regenerate Service: After making changes, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  Debugging: If the issue persists, consider debugging the service implementation to trace where the conflicting type assignment is occurring.
  
  Related Information:
  
  OData Services: Understanding how OData services are structured and how properties are defined can help in troubleshooting this error.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it is responsible for handling OData services in SAP.
  SAP Notes: Check for any relevant SAP Notes or documentation that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engaging with SAP community forums or support channels can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly.