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RE: Help, Corner Analysis doesn't work in vco, error in evaluating the expression.

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the nominal output is like this: and i can simply get this output. it is under conditions of ( temperature 27, typical typical pmos and nmos and 1.2 supply). and when i tried to run it in a different conditions, such as running corner analysis, the tool gives: *Error* ("error" 0 t nil ("*Error* drfGetWaveformYVec (DRL-18): argument not a valid srr waveform interface object nil")) ERROR (ADE-1057): Could not evaluate expression Name:'kvco' Expression:'harmonic(xval(getData("/net15" ?result "pss_fd")) '1)' because of the following error(s) ("error" 0 t nil ("*Error* drfGetWaveformYVec (DRL-18): argument not a valid srr waveform interface object nil")) Ensure that the definition of the expression is correct. *Error* deriv: can't handle deriv(nil) im expecting output like this. but this didn't show up to me, the error showed up instead. i'm using virtuoso 6.1.7

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