Hello all,
        I have designed and lay-outed cascode LNA and also extracted parasitics using Assura QRC. Each flow passed without any error. But post layout simulation using hierarchy editor with av_extracted view giving following error in CADENCE ADEL.

"Error found by spectre in `LPNA', during circuit read-in.
ERROR (SFE-23): "input.scs" 19: c1 is an instance of an undefined model cmodel.
ERROR (SFE-23): "input.scs" 20: c2 is an instance of an undefined model cmodel.
. . . . .  .
. .. . . . .
ERROR (SFE-23): "input.scs" 137: rb1 is an instance of an undefined model ME8_C.
ERROR (SFE-23): "input.scs" 138: rb2 is an instance of an undefined model ME8_C.
ERROR (SFE-23): "input.scs" 139: rb3 is an instance of an undefined model ME8_C."

Where these resistors (rb1,rb2,rb3 etc..) and capacitors(c1,c2 etc) are actually layout parasitics and that are created by ASSURA itself. Assura has  taken these passives from analogLib for extraction.

How this can be resolved? I am using UMC 65nm. I have attached QRC log file as well. Thank you.

Regards,
Vinay Rao.

Andrew, I sincerely thank you for saving much of my time. Yes indeed that is the reason why it was giving such errors.

Regards,
Vinay Rao.