machine roundoff error

Anything that doesn't fit elsewhere.
Post Reply
sonyadave

machine roundoff error

Post by sonyadave »

"The increment in the independent variable is less than machine roundoff error"

I always get the he above error when I am running my code. I am using NEuron 7.3. The error applies only to two of my channel, at certain high conductance values. I am solving with "derivimplicit". I tried 'Cnexp", and it gives the same error.

I started with a precompiled model from modelDB, but I have made lots of changes, and incorporated channels from various existing models.

Thanks,
Sonya

ted
Site Admin
Posts: 5772
Joined: Wed May 18, 2005 4:50 pm
Location: Yale University School of Medicine
Contact:

Re: machine roundoff error

Post by ted »

You might try uninstalling NEURON, then install from the most recent alpha installer for your platform (Mac, PC under MSWin, or Linux) from http://www.neuron.yale.edu/ftp/neuron/versions/alpha/, or get the latest development code from NEURON's mercurial repository (see http://www.neuron.yale.edu/neuron/download/getdevel) and compile that. If that doesn't fix the problem, we'll have to ask for your model source code and try to reproduce the problem in order to diagnose it.

sonyadave

Re: machine roundoff error

Post by sonyadave »

Thanks. I'll try that.
Sonya

Post Reply