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Arduino IDE:NullPointerException loading

PostPosted: Wed Oct 30, 2019 12:32 am
by peter_b

Installed Arduino IDE from default Ubuntu repositories (on Xubuntu 16.04.2). When I connect the Arduino (UNO R3) by USB, it doesn't show up as Device in the IDE, and the following error message is shown (in the IDE message area):
java.lang.NullPointerException thrown while loading

To be continued...