Soft = Picolog 5.20.9
PC = Dell + Windows XP latest version
Hardware = TC08 USB
Problem (observed 3 times = systematic) = Picolog main windows disappears + the data file is unusable
The problem seems caused by the USB: Error code 9
PLW32.EXE has to be terminated with Windows task manager.
Picolog can work again only after USB disconnect/reconnect.