RFC with SNC feature

Dear All,

I want to configure RFC with SNC.

I have configured source and target system with SSO,and both are working fine.

Now i want to create RFC for ABAP system with SNC activation, while testing i am getting below error.

1:-if SNC name is :- p:SAPServiceSID@SAP.NET----i am getting below message

"Error Details    When executing a remote function call, an error occurred."

2:-if SNC name is: - p:user@SAP.NET----i am getting attach message

Kindly advice how to resolve this error.

Thanks & Regards,

Hiten Modi