ERROR_SEM_TIMEOUT when using WinUSB WritePipe

Question

I often get ERROR_SEM_TIMEOUT errors using the WinUSB WritePipe function. This would seem to indicate that there is a timeout, but if I wait a period of time and try again I'm never able to write. I'm writing in 64 byte chucks to the USB device and often don't have problems. Once I start getting the error, I may have to unplug the usb and and close my app before trying again. Has anybody experienced this problem?

Answer 1

I haven't encountered that, but it is what I would expect if the device were not ready or not configured correctly.