HOGDescriptor problem (debug assertion failed) [closed]

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Hi, I have an issue with the HOGDescriptor. I use the hog.setSVMDetector(detectorVector); command to assign a trained vector to HOG.

afterwards I use the hog.detectMultiScale(...); function to detect people in an image.

but after applying the detectMultiScale() function to a sequence and trying to start over again for a new sequence the program gives an assertion failure. It looks like that when the HOGDescriptor deconstructor is called the error is produced.

I get the following error in file dbgheap.c. Expression: _CtrIsValidHeapPointer(pUserData)

By the way, when I do not apply the detectMultiScale() function the error is gone.

What may be causing the problem and how can it be fixed?

I have a class named "Detectors" with a field: HOGDescriptor hog;

my code for initializing hog is:

void Detectors::readHOG(string trainedData, string filename)
{
    hog.winSize = Size(48,96);

    if (filename=="")
        filename = trainedData + "\\ConfigFiles\\HOG_Data.dat";
    else 
        filename = trainedData + filename;
    ifstream HOG_inputFile(filename, ios::in);
    int i=0;

    while (!HOG_inputFile.eof())
    {
        float input;
        HOG_inputFile >> input;
        hog.svmDetector.push_back(input);
        i++;
    }
    hog.svmDetector.pop_back();
    HOG_inputFile.close();

}

my code for detection is:

void Detectors::detectionFunction(Mat current, int detType, bool calcWeights, bool showImg, vector<double> &hogParams)
{   
Mat img;
img = current.clone();
currentFrame = img.clone();
clearPrevious(false, img);

if (detType == 0) // HOG type
{
if (showImg)
namedWindow("people detector", 1);

{
double t = (double)getTickCount();

hog.detectMultiScale(img, found, found_weights, hogParams[10], Size(4,4), Size(32,32), hogParams[8], hogParams[11]);    

...
}
}
}

the detectionFunction() is called in a loop for each frame read from the disk. after all the frames have been processed and when the program wants to finish this error is fired.