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Title

f

Filippo

03/10/2023, 9:12 AMHi, I Have this error in this simple circuit:

```
Failed: sh -c {cd /home/filippo/.xschem/simulations; Xyce "/home/filippo/.xschem/simulations/untitled.spice"
# Add -r "/home/filippo/.xschem/simulations/untitled.raw" if you want all variables saved}
stderr:
Step size reached minimum step size bound
Step size reached minimum step size bound
data:
*****
***** Welcome to the Xyce(TM) Parallel Electronic Simulator
*****
***** This is version Xyce DEVELOPMENT-202303091748-(Public_Release-7.6.0-146-g5330643a-dirty)-opensource
***** Date: Fri Mar 10 10:10:06 CET 2023
***** Executing netlist /home/filippo/.xschem/simulations/untitled.spice
***** Reading and parsing netlist...
Netlist warning: No print specified
***** Setting up topology...
Netlist warning: Voltage Node (NET1) does not have a DC path to ground
Netlist warning: Voltage Node (GND) does not have a DC path to ground
***** Device Count Summary ...
R level 1 (Resistor) 1
V level 1 (Independent Voltage Source) 1
----------------------------------------
Total Devices 2
***** Setting up matrix structure...
***** Number of Unknowns = 3
***** Initializing...
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
Netlist warning: Numerically singular matrix found by Amesos, returning zero
solution to nonlinear solver!
***** Solution Summary *****
Number Successful Steps Taken: 0
Number Failed Steps Attempted: 1
Number Jacobians Evaluated: 62
Number Linear Solves: 62
Number Failed Linear Solves: 25
Number Residual Evaluations: 166
Number Nonlinear Convergence Failures: 1
Total Residual Load Time: 0.000463963 seconds
Total Jacobian Load Time: 7.24792e-05 seconds
Total Linear Solution Time: 0.000531673 seconds
Failed DC sweep steps:
DC Step # 1
***** Total Simulation Solvers Run Time: 0.0103819 seconds
***** Total Elapsed Run Time: 0.639405 seconds
*****
***** End of Xyce(TM) Simulation
*****
Timing summary of 1 processor
Stats Count CPU Time Wall Time
---------------------------------------- ----- --------------------- ---------------------
Xyce 1 0.627 (100.0%) 0.640 (100.0%)
Analysis 1 0.010 ( 1.65%) 0.010 ( 1.62%)
DC Sweep 1 0.010 ( 1.65%) 0.010 ( 1.61%)
Solve 1 0.010 ( 1.64%) 0.010 ( 1.61%)
Residual 166 0.001 ( 0.10%) 0.001 ( 0.09%)
Jacobian 62 0.000 ( 0.02%) 0.000 ( 0.02%)
Linear Solve 62 0.001 ( 0.09%) 0.001 ( 0.09%)
Failed Steps 1 0.000 (<0.01%) 0.000 (<0.01%)
Netlist Import 1 0.607 (96.88%) 0.620 (96.93%)
Parse Context 1 0.583 (92.90%) 0.595 (93.03%)
Distribute Devices 1 0.019 ( 3.05%) 0.019 ( 2.99%)
Verify Devices 1 0.000 (<0.01%) 0.000 (<0.01%)
Instantiate 1 0.000 ( 0.01%) 0.000 ( 0.01%)
Late Initialization 1 0.003 ( 0.55%) 0.003 ( 0.55%)
Global Indices 1 0.000 ( 0.03%) 0.000 ( 0.03%)
Setup Matrix Structure
```

k

Keno Fischer

03/10/2023, 9:14 AMPretty sure GND is not node 0 by default in xyce unless you

`.PREPROCESS REPLACEGROUND TRUE`

👍 1