segmentation fault on traincascade

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Hello.

I'm getting this weird error. I have 437 positive images and 3019 negative images.

The positive images all taken of 35x35 pixels.

This is the command that I use:

opencv_traincascade -data data -vec lv.vec -bg bg.txt -numPos 437 -numNeg 3019 -numStages 10 -w 35 -h 35

if I use -featureType LBP, it hangs on the 0-stage not calculating anything. If I remove it, this is what happens:

===== TRAINING 0-stage =====
<BEGIN
POS count : consumed   437 : 437
NEG count : acceptanceRatio    3019 : 1
Precalculation time: 3
+----+---------+---------+
|  N |    HR   |    FA   |
+----+---------+---------+
|   1|        1|        1|
+----+---------+---------+
|   2|        1|        1|
+----+---------+---------+
|   3|        1| 0.988738|
+----+---------+---------+
|   4|        1| 0.998344|
+----+---------+---------+
|   5|        1| 0.998675|
+----+---------+---------+
Segmentation fault: 11

When I try to retry the process, I get:

PARAMETERS:
cascadeDirName: data
vecFileName: /Users/rafaelruizmunoz/Desktop/metal/lv.vec
bgFileName: bg.txt
numPos: 437
numNeg: 3019
numStages: 10
precalcValBufSize[Mb] : 256
precalcIdxBufSize[Mb] : 256
stageType: BOOST
featureType: HAAR
sampleWidth: 35
sampleHeight: 35
boostType: GAB
minHitRate: 0.995
maxFalseAlarmRate: 0.5
weightTrimRate: 0.95
maxDepth: 1
maxWeakCount: 100
mode: BASIC

Stage 0 is loaded

===== TRAINING 1-stage =====
<BEGIN
POS OpenCV Error: Bad argument (Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.
) in get, file /Users/rafaelruizmunoz/Downloads/opencv/apps/traincascade/imagestorage.cpp, line 163
libc++abi.dylib: terminating with uncaught exception of type cv::Exception: /Users/rafaelruizmunoz/Downloads/opencv/apps/traincascade/imagestorage.cpp:163: error: (-5) Can not get new positive sample. The most possible reason is insufficient count of samples in given vec-file.
 in function get

Abort trap: 6

Does anyone know what is happening?

Thank you in advance.