Re: Drone, expect, Linux, swarm: what do you think causes an error/crash like this?

[Rick Riolo]

I've nerver seen that error.   
But like click and clack, i'm always aready to
give an answer based on virtually no facts!

Are you running the model script, vs the binary which 
'make install' makes?
I ask becauase its seems to be trying to link your model
on the fly, and somehow it seems to have lost track of where all
the *.o files are.   Since the wrapper scripts produced
by plain make commands reference the *.o files with no
path specified (at least as far as I can see),
then if somehow it didn't cd into the app directory
with the *.o files before doing the link, that might
cause what you see.  So maybe something happened
as expect was running the warpper script, eg some
cd failed, but it tried to go on, but then was in
the wrong directory at gcc link time.

but as i said, that's all speculation.
we have run quite a few (ie many thousands by now) 
runs of 2.1.1 models under rh6.0-6.1, with models
not installed with 'make install',  and not seen this happen.

- r

Rick Riolo                           address@hidden
Center for Study of Complex Systems (CSCS)
4477 Randall Lab                
University of Michigan         Ann Arbor MI 48109-1120
Phone: 734 763 3323                  Fax: 734 763 9267
http://www.pscs.umich.edu/PEOPLE/rlr-home.html

On Sat, 29 Jul 2000, Paul E Johnson wrote:

> Date: Sat, 29 Jul 2000 00:14:32 -0500
> From: Paul E Johnson <address@hidden>
> Reply-To: address@hidden
> To: Swarm Support <address@hidden>
> Subject: Drone, expect, Linux,
     swarm: what do you think causes an error/crash  like this?
> 
> This may not be a swarm problem, but rather some expect or linux
> problem, but...
> 
> I set some swarm models running under drone and after a few hours, on
> the 216th model, it crashed and the stderrlog has this:
> 
> /home/pauljohn/swarm/PJProjects/OpinionFormation/MultiOccupancy/opinion:
> Can't reopen pipe to command substitution (fd 8): No child processes
> gcc: main.o: No such file or directory
> gcc: ModelSwarm.o: No such file or directory
> gcc: ObserverSwarm.o: No such file or directory
> gcc: BatchSwarm.o: No such file or directory
> gcc: WrappedListGrid2d.o: No such file or directory
> gcc: ListWrapper.o: No such file or directory
> gcc: Cell.o: No such file or directory
> gcc: MyArguments.o: No such file or directory
> gcc: NewEZGraph.o: No such file or directory
> gcc: Attribute.o: No such file or directory
> gcc: BatchRaster.o: No such file or directory
> gcc: BatchColormap.o: No such file or directory
> gcc: CountHeads.o: No such file or directory
> gcc: Citizen.o: No such file or directory
> gcc: MovingAverage.o: No such file or directory
> 
> I can restart drone and it seems OK, but I'm just curious about what
> causes this one.
> -- 
> Paul E. Johnson                       email: address@hidden
> Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
> University of Kansas                  Office: (785) 864-9086
> Lawrence, Kansas 66045                FAX: (785) 864-5700
> 
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> 


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   with "help" in the body of the message.