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Traincascade Error: Bad argument (Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.

Hi All: Here: http://code.opencv.org/issues/1834 Maria Dimashova She is giving the formula : vec-file has to contain >= (numPose + (numStages-1) * (1 - minHitRate) * numPose) + S, where S is a count of samples from vec-file . First I would like to know where to find this formula, in which document . Second She is writing :Bug "It was fixed in r8913", What daes it mean r8913? Is it Opencv actual version 2.4.3 ? Thank You.