Can someone point me to the naming convention for on the fly saving of FITS file being used by Infinity software. The file name starts with the date, but what do the following numbers mean? So it appears to me the file name is the date then time in 24 hour notation and finally 3 numbers which appear to be in a rough sequence. So what are the three numbers. Also does the software support a fits header reader/editor. If so I cannot find it. Finally I had that same problem of the Infinity software ...not being able to save files. The culprit was Windows 10. The latest Atik core software appears to have fixed this problem