I am using CCDOps ver 5.54 Build 12-NT software which came with the SBIG camera I purchased. I am very happy with this software except for one annoying feature. I find that after I have started an imaging sequence, if I click on another program (file manager, guiding software etc.) I am unable to cancel the imaging process until that particular exposure has finished and another one started. This means that I have to sometimes wait ten or fifteen minutes before I can cancel. I cannot just exit the program because I need to warm up the camera sensor first. Can anyone please tell if there is there any way around this problem. Many thanks, Terry.