DSLRemote Pro and 400D lockup

[craigm]

Hi,

I have a basic application that I have written that uses the command line .exe to take pictures when triggered (approximately 6 seconds between each shot). I take the pictures at high res JPG and store them over the USB onto my laptop.

I have a problem that periodically the 400D locks up and the LCD shows "busy". I have to turn the 400D off to get out of this state. When I turn the camera on again the PC does not see the camera (as new hardware detected) and DSLRemotePro hangs and then crashes. When this happens I have to restart the computer and then turn the camera off/on again. It is as if the PC is confused about the state of the USB device (camera).

My questions are :

1) Does anybody know why the camera is locking up and is there a way to stop it happening
2) Is there a way to reset the PC-USB interface without having to restart the computer.

Any help would be appreciated, it is a very frustrating problem when it happens in a series of 30+ images and you have to re-shoot them all again.

thanks in advance

Craig.

[Chris Breeze]

From your description it sounds as though the Canon drivers are crashing. When this happens there isn't much you can do other than to reboot the PC.

I don't know what is causing the problem though. I've always found the 400D to be extremely reliable on Windows XP Pro and have never managed to crash the drivers or lock up the camera. Older camera models tend to be less reliable if you save images to both the camera and the PC and it might be worth avoiding this setting. The only other thing I can think of is to check the USB connection and if possible use the USB cable supplied with the camera connected to a main USB port on the computer rather than using a USB hub etc.