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e3ace39
(Get the code!)
How to reproduce: Open and run attached project. The simulation works without problems.
Now, delete the hierarchical pin "ccm", the wire and the netname "ccm" in the main schematic, from the sheet symbol. Now, go inside the sub-circuit schematic sheet and delete the sheet pin "ccm" only. Keep the netname inside, it is needed inside.
Now run the simulation again. You get errors:
Warning: singular matrix: check nodes /ccm and /ccm
Note: Starting dynamic gmin stepping
This is not normal, the node "ccm" is fully defined and used inside the subcircuit, is not really needed outside.
The same applies for many other nets defined and used inside only: "Gimju", "Gipc", "Ed2", e.t.c. There is no need to route them outside, but the simulation will crash if I do not bring them outside.