Hello Sl�vek, the package kgtk-qt3-trinity is not installed. Have a nice day On 01.12.18 12:01, Sl�vek Banko wrote: > > Hi MLR, > > the problem with start arduino ide is definitely not caused by writing > to /etc/tqt3/tqt_plugins_3.5rc.tmp. This message only diverts attention > from the real problem. Please do: > > 1. apt-get purge kgtk-qt3-trinity > 2. log out from TDE > 3. log in again to TDE > 4. try to run arduino ide > > Cheers