Using CVode with Short Pulse Stimuli

When Python is the interpreter, what is a good
design for the interface to the basic NEURON
concepts.

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ajpc6d
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Joined: Mon Oct 24, 2022 6:33 pm

Using CVode with Short Pulse Stimuli

Post by ajpc6d »

I have a question related to my last post. From implementing different solvers, I learned that CVode().use_daspk() chooses its own time step sizes. (Right?) This is fine for stimuli in the normal physiological time range. When I try to stimulate the cell with pulses shorter than this, I get the

Code: Select all

NEURON: variable step integrator error
message. In the same message, I can use h.CVode().statistics() to demonstrate an err=-6 message.

Based on printing out the time of each step and seeing the failure time, I don't think the integrator is missing the pulse entirely. Maybe it perceives it as containing a discontinuity? (It doesn't.) What's going on here?

Is there any way to make DASPK/CVODE play nicely with very short pulses?
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