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opencv error

OpenCV Error: Null pointer (NULL or empty buffer) in cvOpenFileStorage, file /Users/vp/work/opencv/modules/core/src/persistence.cpp, line 2665 libc++abi.dylib: terminating with uncaught exception of type cv::Exception: /Users/vp/work/opencv/modules/core/src/persistence.cpp:2665: error: (-27) NULL or empty buffer in function cvOpenFileStorage

video processing - opencv errorerror - cvOpenFileStorage

Hi,

I'm getting the below error when i run the app. What could be the issue ?

OpenCV Error: Null pointer (NULL or empty buffer) in cvOpenFileStorage, file /Users/vp/work/opencv/modules/core/src/persistence.cpp, line 2665 libc++abi.dylib: terminating with uncaught exception of type cv::Exception: /Users/vp/work/opencv/modules/core/src/persistence.cpp:2665: error: (-27) NULL or empty buffer in function cvOpenFileStorage