Loading mechanisms without a gui?

[mctavish]

Hey all,

I am wanting to run neuron without a gui. I can launch via

Code: Select all

nrniv my_init_file.hoc

However, this does not seem to find or load my NMODL files and I get "undefined function" errors from functions that are in these NMODL files.

If I call

Code: Select all

nrngui my_init_file.hoc

, then these additional mechanisms are automatically loaded.

The reason I am wanting to run without the GUI when I have the GUI installed is that I am preparing simulations to run on a parallel computer without a GUI....

Thanks,
Tom

[hines]

In a non-parallel environment, launch the
<cpu_name>/special script instead of
nrniv. (or look at that script and when you
launch nrniv, use the proper -dll argument.

On a parallel computer, you will indeed
launch <installpath>/<cpu_name>/bin/nrniv
under mpiexec or mpirun and you will
give nrniv the -mpi argument. In that case
it will automatically load the shared library
containing the compiled mod files.

[mctavish]

Perfect answer, Ted. Thanks!

[ted]

That should read "Perfect answer, Michael . . . "

[eschombu]

Where is this "<cpu_name>/special" script located? I don't know what folder <cpu_name> refers to. I'm now encountering this problem as well, so if there's newer documentation on how to do this could you point me there?

Thanks!
Erik

[ted]

Specific example on an Intel-based machine with a 32 bit OS:
Suppose ~/myhoc/mcproject contains na.mod

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$ cd ~/myhoc/mcproject
$ ls
na.mod
$ nrnivmodl
 . . . a bunch of msgs ending with the following:
Successfully created i686/special
$ ls
i686  na.mod
$ ls i686/
libnrnmech.la  mod_func.c  mod_func.lo  na.c  na.lo  na.mod  special

Capisce?

[eschombu]

Thanks for the location. What can and cannot be done with this "special" script? I tried running my hoc code, which works through nrngui, but hit a syntax error when cvode.re_init() was called. It works with cvode statements all commented out. Also, one reason I wanted to run without the gui was to get rid of all the "first instance of [variable name]" output, but they are still there. Is there a way to suppress those? Not a big deal if not, though.

Thanks again,
Erik

[ted]

What can and cannot be done with this "special" script?

Whatever doesn't need the GUI. And, if you simply include
load_file("nrngui.hoc")
in your hoc file, you can also do whatever needs the GUI.

I tried running my hoc code, which works through nrngui, but hit a syntax error when cvode.re_init() was called. It works with cvode statements all commented out.

That's news to me. Maybe you uncovered a bug. What's the minimal code that is required to elicit the error msg?

Also, one reason I wanted to run without the gui was to get rid of all the "first instance of [variable name]" output, but they are still there. Is there a way to suppress those?

Try wrapping offending code blocks in paired curly brackets
{
like this
}