sine wave does not generate output when there is another module in the simulator

.lib "amp_out.vams"
.lib "sine_source.vams"
*.ELABORATE work.amp
.ELABORATE work.sinVarFreq
.Trace Tran src Min=-1.0000000e+00 Max=3.0000000e+00

xsine src src_n sinVarFreq

.Eps 1u 100m 100n
.H 1fs 1fs 1ns 125m 2
.Tran 1ns 100ns 0s noise=yes noisestep=1ns traceBreak=yes compress=no compressCoeff=1 compressTolX=0 compressTolY=1u powerup=no timeup=0s predict=no
.Option Tuning=Swift Swift=1m
.Method TRAP lte=no
.PRINT TRAN IN(M)
.LPRINT testbench.b testbench.buf0.in

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

module sinVarFreq(p, n);

inout p, n;
electrical p, n;

parameter real freq = 100.0e2;
parameter real coeff = 1.0e-3;
real tempr;

analog begin
V(p,n) <+ sin(`M_TWO_PI * freq * $abstime * 8e2);
end
endmodule
..............

`include "disciplines.vams"

module amp(out, in);
inout out, in;
electrical out, in;
parameter real Gain = 1, Rin = 1, Cin = 1, Rout = 1, Lout = 1;

analog begin
// gain of amplifier
V(out) <+ Gain*V(in);
// model input admittance
I(in) <+ V(in)/Rin;
I(in) <+ Cin*ddt(V(in));
// model output impedance
V(out) <+ Rout*I(out);
V(out) <+ Lout*ddt(I(out));
end
endmodule

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