How To Fix /IWBEP/CM_CP028 - Proxy model version '&1' not valid

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 028

• Message text: Proxy model version '&1' not valid

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_CP028 - Proxy model version '&1' not valid ?

  The SAP error message /IWBEP/CM_CP028 Proxy model version '&1' not valid typically occurs in the context of SAP Gateway and OData services. This error indicates that the version of the proxy model being referenced is not valid or recognized by the system. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Version Mismatch: The error usually arises when there is a mismatch between the expected version of the proxy model and the version that is currently available in the system.
  Model Not Activated: The proxy model may not be activated or properly generated in the system.
  Changes in the Data Model: If there have been changes to the underlying data model (like changes in the database or service definition), the proxy model may become outdated.
  Transport Issues: If the proxy model was transported from another system, it may not have been transported correctly or completely.
  
  Solutions:
  
  Check Proxy Model Version: Verify the version of the proxy model being used. You can do this by checking the service definition in the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  Re-generate the Proxy Model: If the proxy model is outdated, you can regenerate it. This can be done by:
  
  Going to the Service Builder (/IWBEP/SEGW).
  Opening the relevant project.
  Right-clicking on the project and selecting "Generate Runtime Objects".
  
  
  Activate the Service: Ensure that the OData service is activated. You can do this in the Service Maintenance transaction (/IWFND/MAINT_SERVICE).
  Check for Transport Issues: If the proxy model was transported, ensure that all necessary objects were included in the transport request and that they were imported correctly in the target system.
  Clear Cache: Sometimes, clearing the cache can resolve issues related to outdated models. You can clear the cache using transaction /IWFND/CACHE or by using the relevant options in the SAP Gateway.
  Check for Dependencies: Ensure that all dependencies for the proxy model are met and that there are no missing components.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues faced by other users and the solutions they found.
  Documentation: Review the official SAP documentation for OData services and SAP Gateway for more detailed information on proxy models and their management.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or development team for further investigation.