Numeric overflow in device model/Iteratiin limit reached Problem

[TruPIMP]

I got this OTA project. We were building a tuning filter from 15kHz to 30kHz. I'm using 8th-order 1dB ripple Chebyshev low pass filter (See attachment for schematic). However, when I simulated it, sometimes works, sometimes doesn't. It either shows "Iteration limited reached" or "Numeric overflow in device model". How do I solve this type of probelm?

Thanks much.

[Miguel_V]

Hello,

I have changed a few simulation custom settings to make your circuit run, basically lossening the restrictions on error calculation and iteration precision. Let me know if this fixed it for you. I'm using version 12.

Cheers,

[TruPIMP]

It works. Thanks a lot