Hspice error message please help

[ravichandar]

error happens when writing waveform for post

Hi, I am trying to simulate the ADC i have designed using Hspice. I have a clock running at 20Mhz. i.e a period of 50 ns. I need the simulation to run till 100 milli seconds becuase i am using a current mirror ramp generator for generating a ramp vooltage which requires that much time for producing a ramp output as i am using a 1 uf capacitor for charging.

When i try to simulate in Hspice using .Tran 1n 1m ( i ran it for 1 milli sec with a step of 1 ns) ( i tried a step of 10ns also)

it takes 4-5 hours for simulation and then it stops with an error message saying
**error** error happens when writing waveform for POST=1
time: command terminated abnormally.

Is it because of the memory problem? Can anybody please help how to solve this issue?

Thanks,
RC.

 

[mhowell67]

hspice terminated abnormally

How are you running the simulator? How many nodes are you saving? Are there any output logs? Is there any output data at all?

Could you run a shorter simulation, say 10ns, to see if it will run? If a short sim runs and the long sim fails that could indicate a memory issue.