Hi,
I want to write a VerilogA model which monitors input current and prints a message if it is above certain level. I also want output to be same as input current.

I wrote a model and it works but throws out below error when I add a line for output current to be equal to input. Any suggestions what I'm doing wrong here?

Code:

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

module CurrentMonitor_VlogA(Iin,Iout);

input Iin;
output Iout;
electrical Iin,Iout;

real Ivalue;
parameter real IT2Limit=1m;

analog begin

	Ivalue=I(Iin);
	I(Iout)<+ -I(Iin);

	if (Ivalue>=IT2Limit)
		$strobe("WARNING:Value of current at node Iin has exceeded %g at %m, Iin=%g at simulation time t=%e",IT2Limit,Ivalue,$abstime);
	else
		$strobe("Current at node Iin=%g, simulation time=%e",Ivalue,$abstime);
end

endmodule 

Here is the error message:

   ERROR (SPECTRE-16384): Signal V(Iout) = -732.434 GV exceeds the blowup limit for the quantity `V' which is (1 GV). It is likely that the circuit is unstable. If you really want signals this large, set the `blowup' parameter of this quantity to a larger value.

Thanks Andrew.