QVector<QVector3D> index out of range at pushback operation

I have this typeof data:

Code:

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QVector<QVector3D> vector_aux;
QVector<int> indicies;
QVector<QVector3D> vector_coord;

---

My goal is to rearrange the vector_aux to vector_coord by the value stored in indicies.

If i store my singular data in vector_aux like this no error occured:

Code:

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vector_aux << QVector3D( 0.276388,  0.850649, -0.447220)
           << QVector3D( 0.483971,  0.716565, -0.502302) .. and so on till i store 104 data.

---

The indicies.lenght() => 548

If i try do it and when i stored 500 data the program crash:
..
Ok at = 490
Ok at = 500
ASSERT failure in QVector<T>:: operator[]: "index out of range", file C:\Qt\Qt5.13.1\5.13.1\mingw73_64\include/QtCore/qvector.h, line 448

Code:

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for (int i=0; i<indicies.length(); i++){
       vector_coord.push_back(vector_aux[indicies[i]]);
       if (i%10==0){
           qDebug() << "Ok at =" << i;
       }
 
}

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There is a limit of 500 data that i can store, or there an other reason for my trouble?

Apparently one of your values in "indicies" is larger or equal vector_aux.length().
According to your printout, you should inspect the values of "indicies" in the range 501 to 510.

Put a qDebug statement at the top of your for() loop

Code:

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for (int i=0; i<indicies.length(); i++){
  qDebug() << i << indices[i];

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(before you try to access vector_aux), and you'll probably discover that "indices" does not contain the values you think it should.

Quote:

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.. and so on till i store 104 data.

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Anyway, if vector_aux has only 104 QVector3D items in it, why is indices 548 entries long? And why do you try to push 548 items onto vector_coord when you have only 104 coordinates to start with?

yes, my mistake in my code is that one/more value stored in indicies is out or equal vector_aux.length()

i'm trying to extract data from file generated on blender in format -> blender.obj