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How to concretely fix the following error message: what(): basic_string::_S_construct null not valid

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Hello, Each time I try to run this code, the unix terminal shows me the following error message: * terminate called after throwing an instance of ‘std::logic_error’ what():basic_string::_ S_construct null not valid Press <RETURN> to close this window…* This is my code: #include<opencv2/opencv.hpp> #include<opencv2/highgui.hpp> #include<iostream> using namespace std; using namespace cv; int main(int argc,char **argv){ //Create a window namedWindow( argv1, WINDOW_AUTOSIZE ); //Load an image Mat image=imread( argv1 ); //Show the image in the window imshow( argv1 ); //Clean up destroyWindow( argv1 ); exit( 0 ); } Could you tell me how to concretely fix this problem please? Thank you in advance Information: Operating system: LinuxMint 17 I am working with OpenQt 3.1.2 (opensource)

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