Incorrect vector subscript out of range

[Sir G]

Hi all,
I'm working in visual studio 2010. I'm getting a "vector subscript out of range debug assertion check" -error, which I believe is incorrect.

I have created a minimal example:

int xsize = 4dVector.size();
int ysize = 4dVector[x].size();
int zsize = 4dVector[x][y].size();
int nbelements = 4dVector[x][y][z].size();
 
    for (uint32_t i = 0; i < 4dVector[x][y][z].size(); i++) {        
        Foo* foo = 4dVector[x][y][z][i];
 
        // do something
    }
 

The debugger shows the out-of-range message at line:
Foo* foo = 4dVector[x][y][z][i];

however, when inspecting all variables I find:

xsize = 20;
ysize = 20;
zsize = 20;
nbelements = 17;

x = 11;
y = 17;
z = 14;
i = 14;

I don't see the problem with that?
Also, every time I rerun the program in debugging mode, it breaks with different values in all variables, but always correct values. All help is much appreciated.

[weaknessforcats]

Are all of your vector eements initialized? The out-of-range error is common with usng uninitialized vectors.

vector<int> arr;
arr[5] = 10;     //subscript out-of-range
cout << arr[0];  //subscript out-of-range

[Sir G]

Yes they all were initialized. I have found the problem though. It was a specific concurrency related issue of the program.

Thanks for all help though