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It errors on the calibrateCamera function itself, when i step into the function in debug mode, the last code it executes before giving the error is: template<typename _tp=""> inline void Mat::push_back(const Mat_<_Tp>& m) { push_back((const Mat&)m); }

inline Mat::MSize::MSize(int* _p) : p(_p) {} inline Size Mat::MSize::operator()() const { CV_DbgAssert(p[-1] <= 2); return Size(p[1], p[0]); }

The calibrateCamera function gives the following error when I try to calibrate my webcam with a 8x4 checkerboard: "Unhandled exception at 0x75854598 in calibrationtest2.exe: Microsoft C++ exception: cv::Exception at memory location 0x0058E4A0." Anyone knows what's happening?