[daip] capturing failure

[Eric Greisen]

Dale A. Frail wrote:
> First question, should I go through the helpdesk now instead of daip?
> 
> Real question.
> I have a list of 744 positions and 8 images (5120**2 pixels) at 6 slightly
> different pointings. I need to create light curves for these 744 sources
> and 48 epochs.
> 
> I have written a RUN file to read the flux at each epoch and each position.
> However, some of the sources lie outside a given pointing and the RUN file
> fails. "AIPS 1: PIXXY=**************    1.    1.    1.    1.    1. OUT 
> OF RANGE"
> This is fine but then AIPS does not advance to the next line and the RUN 
> file
> ends.
> 
> Is there a simple way to bypass this failure or test that PIXXY lies in 
> the image?
> 
> RUN file is enclosed.
> 
> thanks,
> 
> Dale
> 
> 
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coordina 3,31,10.81,-27,55,52.8;copixel;imval;maxfit;

We are ahead of you on this one anyway:

The outputs of COPIXEL include the adverb ERROR.

proc doit
copixel
if (^error) then; qimval; maxfit; end
FINISH

You could do a lot more here with looping over the images
and all that too, building up an array of answers and then printing it 
all at once.  MAXFIT has pRTLEV = -1 to make it silent and QIMVAL is a 
quiet version of IMVAL.

Cheers

eric

BTW - Claire would like you to use the helpdesk and it will still come 
to daip - so suit your self.