I have the latest build of CHDK for the ELPH 300, and I am trying to get the remote USB shutter to work. I am running following the directions at
http://chdk.wikia.com/wiki/USB_Remote_Cable.
After everything is set up (parameters set and script running), I connect the USB cable. Then, the shutter closes and the screen goes black. If I leave the cable connected for too long the camera shuts down with error code E41 If I disconnect power promptly, the camera reverts to its previous mode without having taken a picture.
In fact it appears that the camera always shuts down with this error whenever power is supplied (for too long) via the USB cable, even when the remote parameters are not set and scripts are not running.
Any help would be much appreciated.