Assertion Failed Error While Resizing A Vector In A Plug-in Algorithm

I got an Assertion failed error while resizing a vector in a plug-in algorithm.

In order to isolate the problem I created a simple model class in Navigator.h file as shown below:

//========================= begin code =======================

class CStateStats
{
public:
DOUBLE m_dblSum;
DOUBLE m_dblSqrSum;
public:
CStateStats()
{
m_dblSum = 0.0;
m_dblSqrSum = 0.0;
}
};

class CAttStats : public DMHALLOC
{
public:
dmh_vector<CStateStats> vstatestats;
public:
CAttStats() : vstatestats (*this)
{
}
};

//========================= end code =======================



The access to DMHALLOC is provided in that class and in Navigator class as shown below:



//========================= begin code =======================

class ATL_NO_VTABLE NAVIGATOR :

public DMHALLOC,

public CComObjectRootEx<CComMultiThreadModel>,

public CComCoClass<NAVIGATOR, &CLSID_NAVIGATOR>,

public ISupportErrorInfo,

public IDMAlgorithmNavigation

{

public:

NAVIGATOR() : _viAttributeOutput(*this), _vCAttStats(*this)

//========================= end code =======================


I succeded making room for _vCAttStats vector, but when I tried providing room for the vectors of the vector I got an Assertion failed error (file dmhallocator.h Line:56 Expression assert(_dmhalloc._spidmmemoryallocator != NULL)). Please, see the code below, included in NAVIGATOR::GetNodeArrayProperty function:



//========================= begin code =======================

_vCAttStats.resize (2); // <<<<< succeeded here!

// make space for the states

_vCAttStats[0].vstatestats.resize(ulStates); // <<<<<<< assertion failed here!

//========================= end code =======================



I tried using a vector-of-vector approach and I also succeeded.

But I have to use that kind of structure: a vector of class with a vector inside.

I think I must provide a similar approach of vector-of-vector existing in DmhVector.h but I don't know how to do it.

I would apreciate any help.