Hi Karlee, On 10/10/2022 22.18, Karlee Brannam wrote: > ImportError: /usr/local/lib/x86_64-linux-gnu/libgnuradio-voxi.so.1.0.0git: > undefined symbol: _ZN10MainWindowC1EP7QWidget
You do have one undefined symbol. You can use c++filt command to demangle this symbol. $ c++filt _ZN10MainWindowC1EP7QWidget MainWindow::MainWindow(QWidget*) Make sure you have implemented this function in your OOT module and the .cc/.cpp/.cxx file where it is implemented is listed in lib/CMakeLists.txt Regards, Vasil
