Maestro DocsSim Lab
Troubleshooting
What the common Sim Lab errors mean and how to fix them.
Error messages
| Message | What it means | What to try |
|---|---|---|
| Voltage source / wire loop | A voltage source is connected straight across itself or another source with only wire between. | Add a resistor in the loop. |
| Singular matrix | The circuit has no single answer, often because a part is floating or two parts conflict. | Check for unconnected parts and add a ground. |
| Path to ground with no resistance | A wire runs from a source to ground with no resistance. | Add a resistor or load. |
| Convergence failed | The simulator couldn't settle on an answer, often in sharp, fast circuits. | Slow the circuit down, add small resistors in series with sources or loads, and check part values. |
The in-editor Help has a section on these too.
It runs but looks wrong
- Check units:
Mis mega andmis milli. - Make sure there is a ground.
- Check polarity on diodes, LEDs, electrolytic capacitors and transistors.
- Hover over nodes and use a scope to see where the voltage stops being what you expect.
- Look for red dots: they mean two terminals are close but not connected.
It is slow
- Large circuits run slower. Remove parts you don't need.
- Slow computers can't keep up with real-time Arduino circuits. See Build and run.
Saving problems
If you see "This project was saved in another tab or window, so changes here aren't being saved", press Reload the saved project. You'll get the latest copy. See Projects and sharing.