Thank you to all the panellists, I’ll take care of it. Can we leave it open in case there are any mistakes or questions?

Adding "[...]/mingw73_32/bin" to PATH worked! Thank you

@SaundersB Would you be able yo share the sample code as to how you managed to solve this issue? I tried for 2 days now and the only working solution I found was to copy the QT dlls to my project. Regards Dariusz

You're welcome ! Since everything is working now, please mark the thread as solved so other forum users may know a solution has been found :)