Debug simple OpenCV issue in Managed C++

Hi there, I am opening a bmp image and converting it into CV::MAT format (opencv) . And then write that image into disk. Following is the code I am using. If I am using grayscale image, the writing to disk is working fine. If I am using a color image I am getting a memory access violation. Can you please let me know how to fix this? Bitmap^ sourceBMP; sourceBMP = gcnew Bitmap("C:/opencv/[login to view URL]", true); //sourceBMP = gcnew Bitmap("C:/opencv/[login to view URL]", true); cv::Mat cvImg, cvImg_out; System::Drawing::Rectangle rect = System::Drawing::Rectangle(0, 0, sourceBMP->Width, sourceBMP->Height); bmp_Depth = System::Drawing::Bitmap::GetPixelFormatSize(sourceBMP->PixelFormat); bmp_BitsPerPixel = bmp_Depth / 8; bitmapData = sourceBMP->LockBits(rect, System::Drawing::Imaging::ImageLockMode::ReadWrite, sourceBMP->PixelFormat); stride = Math::Abs(bitmapData->Stride); if (bmp_Depth == 8) cvImg = cv::Mat(sourceBMP->Height, stride, CV_8UC1, (char*)bitmapData->[login to view URL]()); if (bmp_Depth == 24) cvImg = cv::Mat(sourceBMP->Height, stride, CV_8UC3, (char*)bitmapData->[login to view URL]()); cv::imwrite("C:/opencv/[login to view URL]", cvImg); if (bmp_Depth == 24) { cv::cvtColor(cvImg, cvImg_out, CV_BGR2XYZ); cv::imwrite("C:/opencv/[login to view URL]", cvImg_out); }