OpenCV Error: Insufficient memory

[lrxjason]

I got this error when I train the model.
OpenCV Error: Insufficient memory (Failed to allocate 15352004 bytes) in cv::OutOfMemoryError, file C:\builds\2_4_PackSlave-win32-vc12-shared\opencv\modules\core\src\alloc.cpp, line 52
I change to use libfacedetection library. And I also use 6 cores CPU (12 threads).
Do you know why it happened?

[lrxjason]

The problem is the 32 bits system. After I change to 64 bits system, there is no error.