What does a Invaid device handle message mean in Ezcad software?

When use an EZCAD software sometime we may meet some problem. Today I will teach you how to solve a “ Invaid device handle” message problem.


1. Check if installed driver correctly

2. Change a USB port

3. Change a USB cable

4. Measure control card power supply if 5V

You can check which step you can sovle your problem accordingly.

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