I just installed Qt5.4.1 MSVC2013 on windows, and when I tried to build a project, I encountered an error like
Unknown module(s) in QT: core gui widgets. Then I add a user environment variable path
D:\Program Files\Qt\5.4\msvc2013_64; but the problem still exests.
I search the internet but it seems no one ever gets similar problem... it really confuses me.