I acquired a stack of fit images (of the Ring Nebula) using ASILive and saved that stacked image to my hard drive. I also saved the original single images. I loaded the single images into the Light directory of ASIDeepStack. I didn't have any Bias, Flat or Dark images and left those fields blank. I clicked on the Stack button and it worked beautifully. I then tried to stack a new sequences of single images (Helix Nebula) and it indicated 0 stacked. I cleared files and tried to re-stack the original series of Ring Nebula single frames and it said 0 of 177 stacked. I quit the program, re-started the computer, cleared files, but I haven't been able to get it to work. I am running this on a macBook pro, Sequoia 15.6.1. Any help?