Re: [Swarm-Support] crash at odd timestep

[Paul Johnson]

Corinne Coen wrote:
> Dear paul,
> Your suggestion to use gdb (with a short explanation) was very helpful.
> Although I had to use a few commands other commands before I could call
> bt
> (e.g., file ./bug, run, bt), I was able to successful find the list that
> was
> emptying in GUI mode.  Problem fixed.
>
> Unfortunately, I have been unable to do the same for my batch mode.
> Despite
> going through BatchSwarm.m carefully, I cannot find any list or array
> that
> doesn't function.  I cannot figure out how to use a "batch" command in
> gdb.
> (Gdb does not recognize "batch").
>
> Any suggestions?
> Corinne
YES.

run gdb as usual,

# gdb ./myprogram

after it starts, then you add the command line options with the set args

> set args -b

for example will give only the -b option.

Note well, if there is some randomness in your design, then it is 
probably wise to fix the random seed so the model runs the same every 
time.  If lists are getting shuffled, you are screwed.

You can do that by the command line option -S 234234, so you'd need

> set args -b -S234w234

Then, before you type "run", also set some break points at lines in your 
code that seem like good check points

> break BatchSwarm.m:55

to stop at line 55.

After that, when you type "run", then you use "n" or "s" or "c" as 
usually, and you can use the usual print commands to examine objects.

pj

--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://pj.freefaculty.org
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