Hi Team,
I use Siril to process my images and the software requires the "frame000X" to be the _last_ option listed in the filename in order to stack/process multiple images. Can you re-order the filename so the frame number is always last? For example:
Light_M31_<exposure>_<filter>_<BIN>_<Date>_<Temp>_<Gain>_frame0001.fit
Thanks!
Dan
https://free-astro.org/index.php?title=Siril