Hi Shawn, Thanks for your reply. I tried to use the "deepprobe" to probe the internal nets in post-layout sim. But it failed unfortunately. Could you correct me if I did anything wrong in the simulation. First of all, my virtuoso version is "ICADV12.3-64b.main.957", and I can see "deepprobe" in analogLib. So I think I can use that symbol directly. Is it correct? Secondly, I used the spf file to include the extracted netlist in the simulation. I am using Maestro interface, is it all right to use "deepprobe"? Thirdly, what is the correct syntax I should put in the "hierarchical node" in deepprobe? Or how can I find the net name of interest in correct syntax? I tried two syntaxes as following, but neither of them works. 1) In the URL you attached and the example for deepprobe, the hierarchy is separated by dot and put "/" before bracket, so I followed it and the test bench netlist is shown like following "IPRB0 \ (i0.Xith0.Xi0.Xthpsf_combo.Xampp.Xth_psf.Xth_sw\[0\].Mpassgate2\[0\].DRN \ thoutp0) iprobe" the simulation finished, but there is an error when plotting the signal "thoutp0", which is the net connecting to "deepprobe" in the test bench top level. The error(WIA-1006) is " it does not evaluate to an object that can be plotted, like a waveform or parametric wave." 2) I copied the net name "i0.Xith0\\/Xi0\\/Xthpsf_combo\\/Xampp\\/Xth_psf\\/Xth_sw\[0\]\\/Mpassgate2\[0\]:DRN" in the save statement to the "hierarchical node". In the test bench netlist, it is following "IPRB0 \ (i0.Xith0\\/Xi0\\/Xthpsf_combo\\/Xampp\\/Xth_psf\\/Xth_sw\\[0\\]\\/Mpassgate2\\[0\\]:SRC \ thoutp0) iprobe " But the simulation is terminated by an error that unexpected operator "/". It looks that slash is not allowed in the "deepprobe". I think slash is usual in extracted netlist. Thanks and regards, Yutao
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