Error while creating odata services for analytic view

Hi All,

I am creating OData service for analytic view with an input parameter "customerid". I am writing the .xsodata file as follows:-

service namespace "AMB_NEWPROJECT.data"

{

"AMB_NEWPROJECT.data::AMB_PRODUCT_SALES"

as "customerview" keys generate local "ID"  

parameters via entity;

}

but when I try to execute it, It's giving me the following error:-

No parameters found for object "AMB_NEWPROJECT.data::AMB_PRODUCT_SALES"

Could anyone please tell me why I am getting this error and how to get rid of it?

Thanks