Dear all, I tried using ImageEnView1.IO.CreateAVIFile to record a video. While the problem is: Sometimes, ImageEnView1.IO.CreateAVIFile works well, sometimes I got a video with 0 file size. I can't figure out the problem yet. Thus, I want to monitor whether ImageEnView1.IO.CreateAVIFile is working or not. If it doesn't work, I wish it can automaticaly notice the user in case the user missed some important video records. Thanks a lot! Yuanyi