I am using ASI Fits View (Win 64) with my ASIAIR Pro and ASI 294MC Pro, and I'm trying to reduce vignetting, so I started taking flats. I then discovered the Fits Viewer doesn't accept just flat files, but requires bias files to be used as well, so I took also some bias files and configured ASI Studio Fits Viewer to use both bias and flat.
Whenever I select BIAS and FLAT files for calibration, the program crash as soon as I try to load a light image and exit without any error message. It keeps crashing back to ASI Studio Menu every time unless I rename/move the folders where I have my calibration files, and I use FITS viewer just for light images. Anybody else experiencing same problems ? It keeps happening even if I restrict the app to use just BIAS without flats.
And by the way, does anybody know why bias are required and flat are not enough ?