[Spookyer (Brett)]

I am doing a 2 panel mosaic. I just did the preprocessing for panel 1. No problems. I am now trying to do Panel 2. I entered the necessary data just like I did with panel 1. Diagnostics says ok. When I run the script I immediately get an error popup saying

Image Calibration
Cannot execute instance in the global context
Reason: NO master calibration frames or overscan regions have been specified.

The processing box thing say towards the bottom

Begin calibration of flat frames
Searching for a master dark frame with exposure time = .5s best match is a master dark frame of unkown exposure time.


I gather from that it is looking at the first flat frame which is .5sec long and saying it doesn't have a matching dark. My master dark loaded is 600sec to match the light images. I have never had this message before. I have checked the usual settings in the script and they are ok and the same I used an hour earlier for panel 1.

I just removed the flats from the script and it runs ok so it must be getting stuck on matching darks to them somehow.

Any ideas?