OpenCV Error: Insufficient memory (Failed to allocate 1440004 bytes) in cv::OutOfMemoryError

code https://github.com/Jo-won/BOW-Train/blob/master/bowtrain_2019_03_10 OpenCV Error: Insufficient memory (Failed to allocate 1440004 bytes) in cv::OutOfMemoryError, file C:\build\2_4_winpack-build-win32-vc14\opencv\modules\core\src\alloc.cpp, line 52 -> this error was shown In code, between line 407 and line 429, this error is blocking me. Somebody help me..