Timestep too small error in proteus

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vijayece19

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ISIS Release 8.09.00 (Build 27865) (C) Labcenter Electronics 1990- 2019.
Bidirectional circuit timestep too small error
[SPICE] transient GMIN stepping at time=8.40648e-006
[SPICE] transient GMIN stepping at time=8.40648e-006
[SPICE] TRAN: Timestep too small; timestep = 1.25e-019: trouble with instance D30.
 

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vijayece19 said:
timestep = 1.25e-019
Click to expand...

No doubt small describes this length of timestep. Try a larger figure on a par with your other time steps (they're in the realm of microseconds).

Perhaps your circuit has a pulse generator? Whatever its frequency, try setting a timestep so a hundred or a thousand timesteps fit into one cycle.
 

Thanks for the response . Could you please suggest how to increase time step in the circuit. Whether i need to modify the rise time and fall time of pulse generator
or i need to increase the rise time and fall time of pulse
 

Options to change timestep should be somewhere in the top menu. Or a pop-down menu, etc. (I don't know specifically about the software you mention.)
Or a remote possibility you'd open the spice netlist in a text editor, and change timestep directly.
 

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