AMS Connect module

Im new to AMS-Verification.
I have modeled differential amplifier in VAMS. 
Now I want to verify it using RNM. Have created a RNM-TB and connectmodule too, for electrical to real and real to electrical.
but im getting error in connectmodule. 

What should be included in connectmodule:
input, output, electrical: must
real, wreal?

`include "disciplines.vams"

//real to electrical; for stimulus conversion
connectmodule real_to_ele ( vin_r, vin_e);
input vin_r;
output vin_e;
real vin_r;
electrical vin_e;
analog begin
V(vin_e) <+ vin_r ;
end
endmodule

//electrical to real; for observing the output
connectmodule elec_to_real( vout_e, vout_r);
input vout_e;
output vout_r;
electrical vout_e;
real vout_r;
analog begin
vout_r = V(vout_e);
end
endmodule