No, you have to use the same compiler that was used to build Qt. You can't mix and match C++ librairies built with MinGW and MSVC.

@ksgj Yeah, avoiding whitespaces and special chars in path names makes the developers life easier. So please mark this topic as SOLVED (button Topic Tools below your first post). Thanks

Hi @asthana-ujjwal and welcome to devnet, Can you show your .pro file ?

Just thought of something… Why not open the qtftp.pro file in Qt Creator and built if from there with the Qt version you are using for your application ?

@kuzulis Thanks a lot for the screenshot. very useful. pardon me because of lots of my questions. I got new error: Could not start process "mingw32-make" INSTALL_ROOT="C:\Users\---\Documents\build-alaki1-Android_for_armeabi_v7a_GCC_4_8_Qt_5_5_0-Release\android-build" install Error while building/deploying project alaki1 (kit: Android for armeabi-v7a (GCC 4.8, Qt 5.5.0)) When executing step "Copy application data" I searched and somebodies says you must set INSTALL_ROOT variable. I dont know it is correct or not? if so how?