Monte Carlo re-running a MC point as Statistical corner

There are two kinds of statistical corner you can create in ADE - either sequence-based or value-based. The value-based is more robust (and means you can make changes to the design; anything unchanged will get the variation in the corner). Sequence-based corners (if you have run with all or mismatch) won't work properly if you added or removed any component in the design - but they should repeat the result if nothing changed.

Which is created depends on how you ran Monte Carlo. If you ran with a fixed-number of points (in Explorer/Assembler) and didn't go into the advanced options and turn on "save statistical parameters", then it will always save sequence-based. If you turned on the saving of these parameters, then you'd get a choice at the time you save the corner.

You didn't say which MC run choice you ran with, or whether you're using ADE XL or Explorer/Assembler.

Either way, i would expect sequence-based corners to also be OK if the design didn't change.

So perhaps  you can say:

1. Which ADE you're running
2. How  you ran Monte Carlo (what the choices on the form were)
3. Which Spectre sub-version  you're running (at the top of the spectre log file)

Andrew 

Thank you Andrew, I think I found the problem, I mistakenly used regular model files for running "single run, sweeps and corner" instead of the MC model files. 

Thank you Andrew, I think I found the problem, I mistakenly used regular model files for running "single run, sweeps and corner" instead of the MC model files.