No instances can be created from abstract classes

Dear SAPGurus,

I have developed a oData Service in my backend system & able to register the service in the gateway hub system. When i try to execute the metadata of the service from gateway system i am able to see the metadata with list of entity types availble in the data model.

But when i try to execute with entity set i am getting the following error.

"The class 'ZCL_ZGRC_DATA_MODEL_DPC' is abstract. No instances can be created from abstract classes."

Where my data model provider class name is  'ZCL_ZGRC_DATA_MODEL_DPC'

Kindly help me.

Thanks & Regards,

Rumeshbabu S