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Problem with SPAWN() [message #33767]

Mon, 20 January 2003 16:18

sciprogrammer
Messages: 2
Registered: January 2003

Junior Member

I'm having trouble with the SPAWN() command. When I load-level IDL
using lsrun (part of the LSF suite of load-balancing software) I see a
strange problem where calls to SPAWN() produce a "no such file or
directory" error. This happens with even very simple commands.
Here's an example:

Start with a very simple .pro file that spawns the pwd command:

% cat test2.pro
spawn,'/bin/pwd'
exit

Load-level IDL using lsrun:

% lsrun -m "lsf002" idl test2
[...usual IDL startup message...]
% SPAWN: Error managing child process.
No such file or directory

That fails, but if I load-level the pwd command directly it works:

% lsrun -m "lsf002" /bin/pwd
/u/burruss

I can also get this to work if I use SPAWN() with the NOSHELL keyword
as in this example:

spawn,['/bin/pwd'],/noshell
exit

The only thing I can think of is that perhaps the "no such file or
directory" message comes from IDL trying to start up a non-existent
shell. Does anyone have any ideas about this? How does SPAWN()
select which shell to start?

The platforms I'm using are Tru64 5.1, HP-UX 11i, and RedHat 7.3
Linux. I'm using IDL version 5.5.

Justin

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[Message index]

		Problem with SPAWN() By: sciprogrammer on Mon, 20 January 2003 16:18
		Re: problem with spawn By: mads on Sun, 17 August 2003 21:56
		Re: problem with spawn By: tianyf_cn on Sun, 17 August 2003 20:07
		Re: problem with spawn By: Robert Moss on Sun, 17 August 2003 08:39

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