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Re: Help with Spawn [message #61569 is a reply to message #61482]

Fri, 18 July 2008 10:24

jeffnettles4870
Messages: 111
Registered: October 2006

Senior Member

On Jul 18, 10:17 am, Vince Hradil <hrad...@yahoo.com> wrote:
> On Jul 18, 8:48 am, "Jeff N." <jeffnettles4...@gmail.com> wrote:
>
>
>
>> On Jul 18, 7:23 am, alex...@gmail.com wrote:
>
>>> Hello everybody. My question is simple, yet I haven't found a
>>> satisfying answer in the various guides.
>
>>> I'm using spawn to call for an executable file under the Windows OS,
>>> it oppens a command window and executes there. The problem is, very
>>> quickly I get an error and the entire command shell closes
>>> momentarily. I'd want to be able to see the error it presents before
>>> closing the shell, or just leave it open.
>
>>> Is this possible? Is there any other way around it?
>
>>> Thanks a lot for any help, Alex
>
>> Another trick i do a lot is just print out the command that you're
>> going to spawn using a print statement, then open up your own command
>> window and paste in that command. The command shell isn't going to
>> close when you do that, and I often find it's easier to fix whatever
>> mistakes i've made with the command i'm trying to issue in the actual
>> command window then go back to my IDL program and make sure it spawns
>> the fixed command.
>
>> Jeff
>
> How about using the LOG_OUTPUT keyword? Simple is good...

I've actually had that keyword not work for me a few times. It's
always been when the program i've tried to spawn was not an OS command
(e.g., dir, cd, etc.), and i think it was also a program where the
output wasn't outputting one line of text for each iteration but
rather doing a sequence like print output/clear screen/print output/
etc....

This was a long time ago and a minor issue so i just did the cut-and-
paste-the-spawn-string trick i mentioned earlier and then moved on :)
It would be good to know, though, if this is something anyone else has
run into...

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[Message index]

		Help with SPAWN By: Marc Reinig on Fri, 21 January 2005 17:27
		Re: Help with Spawn By: Vince Hradil on Fri, 18 July 2008 07:17
		Re: Help with Spawn By: alexbaz on Sat, 19 July 2008 09:41
		Re: Help with Spawn By: jeffnettles4870 on Fri, 18 July 2008 10:24
		Re: Help with Spawn By: jeffnettles4870 on Fri, 18 July 2008 06:48
		Re: Help with Spawn By: Andrew Cool on Fri, 18 July 2008 06:06
		Re: Help with Spawn By: jeffnettles4870 on Sat, 19 July 2008 12:53
		Re: Help with Spawn By: Vince Hradil on Sat, 19 July 2008 06:22
		Re: Help with Spawn By: jeffnettles4870 on Fri, 18 July 2008 17:37
		Re: Help with Spawn By: Vince Hradil on Fri, 18 July 2008 10:46

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