Fetch entity: no error but response is empty

Hi,

I have a weird issue when I fetch one of my entities: I don't have any error but the response is empty (I enabled trace logging to see what was going on).

{
  "d":
  {
    "results": []
  }
}

The thing is, this used to work just fine.

When I execute the same request in the backend (GW client), I get the expected result. When I test the destination in the mobile services dev & ops and select the same entity, I also get some data. I also used the assistant to re-generate the proxy classes. I have a master detail app generated with the assistant and the response is also empty for this entity but everything seems to work just fine for the other entities.

How am I supposed to debug this? :-)

Cheers,

Pierre