Subframe Selector - 0 PSF fittings?

[drmikevt]

Hello.  I am working with some images from the other night and LBG all processed normally.  However, about half of the R subframes come up with "0 PSF fittings" and 0 for FWHM no matter which PSF model I use in the Subframe Selector script.  Visually, if I autostretch the 'bad' frames and look at them versus the good frames - I can't see any real difference.  For all the frames, it finds about 3000 stars - good and bad. 

Can anyone help me get this figured out? 

Thanks!
Mike

[drmikevt]

I'll also add that Neb4 did not mind the subframes and weighted them for me without issue...  what could be going on?

[pfile]

you'll have to post the problematic frames somewhere - no way to debug this without taking a look at the files.

rob