My program uses canon EDSDK 2.15, and my camera model is EOS100D.
The program starts live view then takes photos when user click a button. It takes photos well most of time, but sometimes live view doesn't work. There is not any error message that camera doesn't connect to program as well. Just transparent rectangle places instead of live view. Of course taking photo function does nothing.
I found the case that if two programs using the camera are running at same time, the late executed program does not catch the camera. But it is not the case. The problem occurs when single program is running.
Does anyone have any idea of this problem?