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I'm using opencv 2.4.10 with visual studio ultimate 2010. I train haarcascade: -data clasifier -vec G01_442_2424.vec -bg negative.txt -numPos 30 -numNeg 60 -numStages 15 -nsplits 2 -nonsym -minhitrate 0.998 -maxfalsealarm 0.5 -mem 1024 -mode ALL -w 24 -h 24 -baseFormatSave.

Code i using:

#include "opencv/cv.h"
#include "opencv/highgui.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "assert.h"
#include "math.h"
#include "float.h"
#include "limits.h"
#include "time.h"
#include "ctype.h"

const char *cascade_name="cascade.xml";

void detect_and_draw( IplImage* img )
{

    // Create memory for calculations
    static CvMemStorage* storage = 0;

    // Create a new Haar classifier
    static CvHaarClassifierCascade* cascade = 0;

    // Sets the scale with which the rectangle is drawn with
    int scale = 1;

    // Create two points to represent the hand locations
    CvPoint pt1, pt2;

    // Looping variable
    int i;

    // Load the HaarClassifierCascade
    cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
    //cvHaarDetectObjects( inImage.getCvImage(), cascade, storage, scaleHaar, 2, CV_HAAR_DO_CANNY_PRUNING);

    // Check whether the cascade has loaded successfully. Else report and error and quit
    if( !cascade )
    {
        fprintf( stderr, "ERROR: Could not load classifier cascade\n" );
        return;
    }

    // Allocate the memory storage
    storage = cvCreateMemStorage(0);

    // Create a new named window with title: result
    cvNamedWindow( "result", 1 );

    // Clear the memory storage which was used before
    cvClearMemStorage( storage );

    // Find whether the cascade is loaded, to find the hands. If yes, then:
    if( cascade )
    {

        // There can be more than one hand in an image. So create a growable sequence of hands.
        // Detect the objects and store them in the sequence
        CvSeq* hands = cvHaarDetectObjects( img, cascade, storage,
                                            1.1, 2, CV_HAAR_DO_CANNY_PRUNING,
                                            cvSize(40, 40) );

        // Loop the number of hands found.
        for( i = 0; i < (hands ? hands->total : 0); i++ )
        {
           // Create a new rectangle for drawing the hand
            CvRect* r = (CvRect*)cvGetSeqElem( hands, i );

            // Find the dimensions of the hand,and scale it if necessary
            pt1.x = r->x*scale;
            pt2.x = (r->x+r->width)*scale;
            pt1.y = r->y*scale;
            pt2.y = (r->y+r->height)*scale;

            // Draw the rectangle in the input image
            cvRectangle( img, pt1, pt2, CV_RGB(230,20,232), 3, 8, 0 );
        }
    }

    // Show the image in the window named "result"
    cvShowImage( "result", img );

}

int main()
{

  // Gets the input video stream from camera
  CvCapture* capture = cvCaptureFromCAM( 0 );

  // Checks if the input stream is obtained
  if( !capture )
  {
    fprintf( stderr, "ERROR: capture is NULL \n" );
    getchar();
    return -1;
  }

  // Show the image captured from the camera in the window and repeat
  while( 1 )
  {

    // Get one frame
    IplImage* frame = cvQueryFrame( capture );

    // Cecks if a frame is obtained
    if( !frame )
    {
      fprintf( stderr, "ERROR: frame is null...\n" );
      getchar();
      break;
    }

    // Flips the frame into mirror image
    cvFlip(frame,frame,1);

    // Call the function to detect and draw the hand positions
    detect_and_draw(frame);

    //If ESC key pressed exit
if( (cvWaitKey(10) & 255) == 27 )
      break;
  }

  // Release the capture device housekeeping
  cvReleaseCapture( &capture );

  return 0;
}

And i get: Unspecified error (The node does not represent a user object (unknown type?)) in function cvRead

I dont know what to do, please help :(