How To Fix /IWBEP/CM_V4_MED390 - Value control property not allowed for collection in property '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 390

• Message text: Value control property not allowed for collection in property '&1'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED390 - Value control property not allowed for collection in property '&1' ?

  The SAP error message /IWBEP/CM_V4_MED390 indicates that there is an issue with the value control property being used in a collection context within an OData service. This error typically arises when you are trying to apply a value control property (like ValueList, ValueHelp, etc.) to a collection of entities, which is not allowed.
  Cause:
  
  Incorrect Property Usage: The error occurs when a property that is meant to control values (like a dropdown or a reference) is incorrectly applied to a collection of entities instead of a single entity.
  OData Model Configuration: The OData model might be incorrectly configured, leading to the application of value control properties to collections.
  Service Definition Issues: There may be issues in the service definition or metadata that do not align with the expected structure of the OData service.
  
  Solution:
  
  Check Property Definition: Review the property definition in your OData service. Ensure that value control properties are only applied to single entity properties and not to collections.
  Adjust the OData Model: If you are using an OData model in your application, ensure that the model is correctly defined and that value control properties are only applied where appropriate.
  Modify the Service Implementation: If you are implementing the OData service, check the implementation code to ensure that value control properties are not being applied to collections.
  Update Metadata: If there are discrepancies in the metadata, regenerate or update the service metadata to ensure it reflects the correct structure.
  Testing: After making changes, test the OData service to ensure that the error is resolved and that the expected behavior is achieved.
  
  Related Information:
  
  OData Documentation: Review the OData documentation for guidelines on how to properly define properties and collections.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Debugging: Use debugging tools in SAP to trace the execution and identify where the incorrect property application is occurring.
  Community Forums: Engage with SAP community forums or support channels for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.