Hello guys , sorry for my dumb question ...
[https://easyeda\.com/editor\#id=\|81849bda2c7343c3901c17d790f5a619](https://easyeda.com/editor#id=%7C81849bda2c7343c3901c17d790f5a619)
Why my simulation doesn't work?
> Circuit: gooduntitled
>
> Doing analysis at TEMP = 27.000000 and TNOM = 27.000000
> Warning: singular matrix: check nodes r1\_2 and r1\_2
> Note: Starting dynamic gmin stepping
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Warning: singular matrix: check nodes r1\_2 and r1\_2
>
> Warning: Dynamic gmin stepping failed
> Note: Starting source stepping
> Warning: singular matrix: check nodes r1\_2 and r1\_2
>
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful gmin step
> Note: One successful source step
> Warning: singular matrix: check nodes r1\_2 and r1\_2
>
> Warning: singular matrix: check nodes r1\_2 and r1\_2
>
> Warning: source stepping failed
>
> Transient solution failed -
>
> Last Node Voltages
> \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
>
> Node Last Voltage Previous Iter
> \-\-\-\- \-\-\-\-\-\-\-\-\-\-\-\- \-\-\-\-\-\-\-\-\-\-\-\-\-
> r1_2 0 0
> volprobe 0 0
> v1#branch 0 0
doAnalyses: iteration limit reached
> tran simulation(s) aborted
> Error(parse.c--checkvalid): volprobe: no such vector.
> ngspice-26 done
I need only to check a voltage with the probe. I'm trying to read the voltage probe documentation but without success.
Thanks
