@Saman19 said in using Jsoncpp library in Qt on Raspberry pi 3: /media/saman/62ca0b6d-6291-4c40-b1fd-11bc291e4a38/usr/lib/libjsoncpp.so Please show the output of the commands file /media/saman/62ca0b6d-6291-4c40-b1fd-11bc291e4a38/usr/lib/libjsoncpp.so ldd /media/saman/62ca0b6d-6291-4c40-b1fd-11bc291e4a38/usr/lib/libjsoncpp.so Any reason you don't use Qt's built-in JSON support?