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Re-evaluating an "eval err" expression after simulation

RuihW

Hello,

I was running transient simulation on a large circuit in ADE Explorer,and it took 4 days to complete. However, it returned "eval errr" for the output expression. In my previous experience, it's likely due to an invalid expression so I'm working on fixing it. But I really don't want to spend another 4 days to run it, and even worse, that gives me another "eval err" at the end. Is it possible to update and re-evaluate an expression that returned "eval err" without re-running the simulation?

An additional question, the log of the transient simulation has these lines. Does that mean spectre had a convergence issue with homotopy = gmin? If I have to re-run the simulation, how can I let spectre to skip the first one and use homotopy = source directly? That'll likely save me 40% of the simulation time.

Trying `homotopy = gmin' for initial conditions.
Trying `homotopy = source' for initial conditions.
Notice from spectre during IC analysis, during transient analysis `tran'.
    GminDC = 1 pS is large enough to noticeably affect the DC solution.
        dV(I0.O0.OB0.OM825.I0.M13:int_d) = -119.442 mV
        Use the `gmin_check' option to eliminate or expand this report.
    Bad pivoting is found during DC analysis. Option dc_pivot_check=yes is recommended for possible improvement of convergence.

DC simulation time: CPU = 130.157 ks, elapsed = 130.186 ks.
Many thanks!

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