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Re: Catched in a catch loop [message #94800 is a reply to message #94799]

Wed, 18 October 2017 07:10

Jim Pendleton
Messages: 165
Registered: November 2011

Senior Member

On Wednesday, October 18, 2017 at 7:48:37 AM UTC-6, LNpellen wrote:
> I'm not used to CATCH - I strive to write the code robust enough to not cause errors. No I need it and seem to not understand how.
>
> Using RESTORE with a not valid save file causes
> % RESTORE: Not a valid save file:
>
> So I try with this catch, but the error occurs even though I get the dialog With the error-message I wrote (looping until I have to crash the program).
>
> What have I misunderstood?
>
>
>
> CATCH, err_stat
> IF err_stat NE 0 THEN BEGIN
> CATCH, /CANCEL
> sv=DIALOG_MESSAGE('Not valid .sav file: '+adr, /INFORMATION)
> ENDIF
> RESTORE, adr
>
>
>
> -Ellen

You will want a RETURN of some sort after your DIALOG_MESSAGE call otherwise the code will continue to run past the ENDIF statement. In this case it would execute the RESTORE a second time and stop.

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[Message index]

		Catched in a catch loop By: LNpellen on Wed, 18 October 2017 06:48
		Re: Catched in a catch loop By: Jim Pendleton on Wed, 18 October 2017 07:10
		Re: Catched in a catch loop By: Markus Schmassmann on Wed, 18 October 2017 07:21
		Re: Catched in a catch loop By: LNpellen on Wed, 18 October 2017 22:21

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