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Hello Guys,
Has anyone encountered this error before on NGSPICE.
I am trying to do a transient simulation of a current sensor

No. of Data Rows : 0
doAnalyses: TRAN:  Timestep too small; initial timepoint: cause unrecorded.

Attaching a snippet of the circuit below

<@U02J59Q3FM0> Increase the time step in . trans command if you are performing transient simulation

Hi <@U021BTRSZ5H> its at 0.1ms will increase to 0.5ms and check

You should give start time stop time and then step

I think there is a syntax with just step and stop time.
Trying with &lt;start stop step&gt;

<@U021BTRSZ5H> i tried with a start time still the same problem

I read online i might have to give the capacitor some initial charge to avoid this any idea how i can do that?

You have given pulse input. I can see the time in usec . Try to do trans simulation in usec

However should that cause a problem different order of magnitude in Tran and pulse sources

I tried still the same I think it has something to do with the capacitor I removed it to check what will happen 

Its not able to find the DC bias point its failing because of that i need to check why DC setup is failing

<@U021BTRSZ5H> I played around a little and looks like the issue was with some of the transistors in my comparator since the input signals came through a power transistor ngspice was not able to calculate the dc bias and failed. I manually set the gate voltages to zero and it worked fine 