How To Fix /IWBEP/CM_V4_MED066 - Type '&1' not allowed for key properties

/IWBEP/CM_V4_MED066 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 066

• Message text: Type '&1' not allowed for key properties

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.

/IWBEP/CM_V4_MED066 - Details

• The SAP error message /IWBEP/CM_V4_MED066 Type '&1' not allowed for key properties typically occurs in the context of OData services when there is an issue with the definition of key properties in your OData model. This error indicates that the type of a property that is being used as a key is not valid or not supported.
  
  Cause:
  
  Invalid Data Type: The property defined as a key in your OData service may have a data type that is not allowed for key properties. For example, certain complex types or unsupported primitive types cannot be used as keys.
  Model Definition Issues: There may be inconsistencies or errors in the way the OData model is defined, particularly in the metadata where the entity types and their properties are specified.
  Key Property Configuration: The key properties may not be correctly configured in the service definition, leading to this error when the service is accessed.
  
  
  Solution:
  
  Check Data Types: Review