OData caching

Hi,

I am trying to set up caching for OData on the Gateway system. (Not the metadata, but the actual call.)

I follow the help: Registering an OData Service for Caching - SAP NetWeaver User Interface Services - SAP Library

When I use transaction /IWBEP/REG_SERVICE in the backend and set the data provider class to /UI2/CL_GW_DP_CACHE, I get an error after waiting for long time: RFC Error: No storage space available for FORM stack. If I don't set it, the service is working, but it is not cached, what I see in the sap-statistics:

I have maintained Data Provider Class in transaction /UI2/CACHE for my service in the Gateway system. I looked up the data provider class in the Service Implementation.

Any ideas or suggestions?

Thanks,

Tamas