How to handle runtime errors?

sebastian · Active IRAF User Joined: 21 Mar 2007 Posts: 45

Hi, perhaps somebody has asked this before, but since the forum search returns the '404 not found', I would like to ask it anyway.
Is there a way to handle runtime errors in a script?
I mean, if some task fails to do something, like trying to open a file
that is not present or something more intrinsic(cause the former could be done by using if(!access("file")) before ) like some error computation when using imalign, is there a way of continuing using a script handling that specific case as say, a conditional? If an error is returned in performing a given task within a script, change some parameters and run that task again.
thanks
Best regards!

seba

fitz · Posted: Fri Aug 05, 2011 1:33 am Post subject:

Error handling in the CL is done using the 'iferr' expression, e.g.