hi victornsy,I am a beginner too,and I am learning C++ now,but when I press the F9,i've got the same on you.And my english is not good,I can't understand what you said ,what can i do now?and when i got the tab you said ,i found the default path is C:\mingw,but there is no this folder in my C:\ .I don't know how to let my C::B work.so ,if you can help me ,please write down the simple steps to let my C::B work ,thank you!:)