"Warning: Singular matrix. Check node ¥0"

QSPICE
1

Hi,

This circuit has one floating node. From inspection, this node is believed to be floating: ¥0
Warning: Singular matrix. Check node ¥0
Starting Gmin stepping.
Warning: Singular matrix. Check nodes VVLIM_LOW_VB•X21#BRANCH and E_VIO•X22#BRANCH
Warning: Singular matrix. Check node ¥0
Warning: Gmin stepping failed.
Starting source stepping.
Warning: Singular matrix. Check node ¥0
Warning: Source stepping couldn’t start.
Starting pseudo transient analysis.
Warning: Singular matrix. Check node ¥0
Warning: Singular matrix. Check node ¥0
Pseudo transient analysis failed.
Warning: Using skipbp
Simulation process terminated.

The simulation is outputting this message and I’m not sure what it means. I can’t find any ¥0 element. I do have ¥1 as a XOR gate. I was wondering whether ¥0 was a component created by default in any simulation.

My simulation is pretty large with several C codes, SPICE components and other and can’t be shared.

Regards

2

View> Netlist to see if you can locate ¥0.

For troubleshooting large circuit, comment circuit section by section to narrow target area.

1 Like
3

ahh! That made it, it was a C block.

You are the real MVP.

Regards

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