Message type: E = Error
Message class:  SADL_GW_DT_CDS - Messages CDS Checks 
Message number: 075
Message text: Entityset Name '&1' not given or exeeds 30 Characters
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The SAP error message SADL_GW_DT_CDS075 indicates that there is an issue with the entity set name in a Core Data Services (CDS) view or a related service definition. Specifically, the error states that the entity set name is either not provided or exceeds the maximum allowed length of 30 characters.
Cause: Entity Set Name Not Provided: The entity set name is missing in the definition of the CDS view or the service. Entity Set Name Exceeds Length: The entity set name provided exceeds the maximum character limit of 30 characters, which is a restriction in SAP Gateway and OData services.
Solution: To resolve this error, you can take the following steps: Check the CDS View Definition: Open the CDS view in the ABAP Development Tools (ADT) or the relevant transaction (e.g., SE11). Ensure that the entity set name is defined correctly in the @OData.publish: true annotation. Modify the Entity Set Name: If the entity set name is missing, provide a
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