Hello all,
Im making a 2x1 multiplexer. Could somebody guess  the reason for these errors;

Error found by spectre during SpectreHDL compile.
"in = (V(Vsel) > vtrans) ? V(Vin2): V(Vin1)<<--? ;  
Error: no discipline was specified for `Vin1'.



`include "constants.vams"
`include "disciplines.vams"

module Mux2to1(Vin1, Vin2,Vsel,Vout);
output Vout;
electrical Vout;
input Vin1, Vin2, Vsel;
electrical Vin, Vin2, Vsel ;

parameter real vtrans = 0.5;
parameter real vlow = 0;
parameter real vhigh = 1 ;
parameter real trise = 1p;
parameter real tfall= 1p;
parameter real tdel= 1p;
integer  out_val ;
integer  x, in;
analog begin
     in = (V(Vsel) > vtrans) ? V(Vin2): V(Vin1);      
     V(Vout) <+ transition (vhigh*in + vlow*!in , tdel, trise, tfall);  
end

endmodule

oh well, thanks.

I made my circuit work without having to use it, as a way to ramp it up !

Thanks again !