x256a3buXplained and atmel-ice are connected together and both of them to computer via USB.
using atmel studio 7.0 on windows 10.
As Atmel-ICE is not detected by atmel studio, I use avrdude to program the device.
Everything's fine until I flash code which sends data from MCU to computer and I open COM PORT to visualise data coming from MCU (note that this works fine).
But the following suggests that I broke something at this point : after this step, I regularly receives this msg from atmel studio :
I think I identified two cases in which this happens.
First case : as soon as I start to flash code while there is already code using USB on MCU
Second case : no special rule, just pops from time to time
Any idea ?