A problem I used to have on my Mac was that I had another application (LiveScribe) which would periodically wake up, scan the USB devices, and then poke at any which were of a certain flavour without regard to whether they had the USB VID (vendor ID) for the specific device the application cared about. It would open an I/O channel to the Eggbot, try sending some data to it, and then give up. That data it sent would mess up my plot. And, on Linux and OS X, there’s no mandatory device locking — any process could do that. On Windows, there is mandatory locking and, unless you take steps otherwise, when you open an I/O channel to a device, no other process can then access the device. (And if another process already was accessing the device, then you cannot access it — you are locked out.)
Re: Solved – Stipple file will not completely print
Anyhow, it’s always possible that you are seeing such an issue.
Dan
