| Re: Questions about using CATCH [message #34045] |
Wed, 12 February 2003 23:47  |
Jonathan Greenberg
Messages: 91
Registered: November 2002
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Member |
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Thanks! catch,/cancel was the key -- I was not using it really to debug,
rather, I needed to control some of the IDL routines that don't have
explicit error handling (like file_copy --> the program had one routine if
it failed, not just quitting out).
--j
On 2/12/03 9:36 PM, in article MPG.18b4dcb67e4bd143989ae0@news.frii.com,
"David Fanning" <david@dfanning.com> wrote:
> Jonathan Greenberg (greenberg@ucdavis.edu) writes:
>
>> Couple of questions about "catch":
>>
>> 1) If I have two catch calls in the save program, will the program return to
>> the most recent catch statement (and error handling procedure)?
>
> Yes, only one CATCH can be current in a program module
> at any one time, but you can put as many as you like, to
> catch as many errors as you like, in your program module.
> When an error occurs, you will be directed to the first
> line of code after the CATCH that is currently registered
> for that program module.
>
>> 2) Can I supress the output of a "caught" error (e.g. I assume that my error
>> handler worked, so I don't want to see the error each time)?
>
> You can do whatever you like. :-)
>
> I don't recommend, however, handling errors silently.
> Debugging programs that handle errors silently can
> be similar to a bad drug experience. After a couple of
> days of it, you are completely psychotic. :-(
>
> Cheers,
>
> David
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