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Runtime Error :-QSettings::value: Empty key passed

Recently I installed opencv 3.4.0 and built it with libqt4-dev as i had some problems with the gtk tools. Every opencv program is being compiled properly but during the execution there is always an unexpected error of: QSettings::value: Empty key passed for which either the video file is not opened from the first and the whole program gets terminated or some expected console outputs are not shown. Can any one help me out?