Solution
The
Time Step Too Small Error in Multisim is a very generic error that can represent a number of different simulation issues.
In smaller circuits, this error is generally due to a mistake in wiring or connecting components, so this possibility should be checked first.
If the wiring has been validated in the circuit follow these steps:
- Select Simulation » Interactive Simulation Settings
- Under Initial conditions select Set to zero
- Click the OK button
Check to see if the simulation now works. If not:
- Select Simulation » Interactive Simulation Settings
- Check Set maximum time step (TMAX)
- Select Maximum Time Step (TMAX) and change it from 1e-005 to 1e-003
- Click the OK button
Check to see if the simulation now works. If not:
- Select Simulation » Interactive Simulation Settings
- Select the Analysis Options tab
- Select the Use Custom Setting radio button and click on the Customize button
- Select the Global tab
- Check the Relative Error Tolerance [RELTOL] to ON and set it to 0.01
- Set Shunt resistance from analog nodes to ground [RSHUNT] to 1e+9
- Select the Transient tab
- Check Integration Method [METHOD] to ON and set it to Gear
- Click the OK button