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I am still having the same error:

[ 95%] Building CXX object procrob_functional/CMakeFiles/Fserver.dir/src/face_recognition.cpp.o /home/nvidia/catkin_ws/src/procrob_functional/src/face_recognition_lib.cpp: In member function ‘void FaceRecognitionLib::storeEigenfaceImages()’: /home/nvidia/catkin_ws/src/procrob_functional/src/face_recognition_lib.cpp:333:31: error: ‘cvCopyImage’ was not declared in this scope cvCopyImage(byteImg, bigImg); ^ /home/nvidia/catkin_ws/src/procrob_functional/src/face_recognition_lib.cpp: In member function ‘bool FaceRecognitionLib::learn(const char)’: /home/nvidia/catkin_ws/src/procrob_functional/src/face_recognition_lib.cpp:375:45: error: ‘cvEigenDecomposite’ was not declared in this scope projectedTrainFaceMat->data.fl + ioffset);