Exception Unhandled: using NCollection_BaseVector

I'm working on triangles to quads in occ at the moment, I am getting this error:

Unhandled exception at 0x00007FF9217AFDEC in quad-remeshing.exe: Microsoft C++ exception: Standard_OutOfRange at memory location 0x000000AC3AF3F700.

pointing to the line:

Standard_OutOfRange_Raise_if (theIndex < 0 || theIndex >= myLength,
                                  "NCollection_BaseVector::findV");

after using this iterator

for (NCollection_Vector<Poly_CoherentLink>::Iterator anIterL(myLinks); anIterL.More(); anIterL.Next())

,it should be noted that this manages to cycle through a decent amount of iterations before breaking my base class, which i have named BRepMesh_PolyRemesh to atempt to keep with OCC naming convetions, inherits from the Poly_CoherentTriangulation class, its initialiser iterates through the brep's faces and adds all the mesh elements to one coherent mesh, then calls the calculate links function:

if (aFaceTriangulation.IsNull() == Standard_False) {
            const Standard_Integer nNodes = aFaceTriangulation->NbNodes();
            Standard_Integer i;

            // Copy the nodes
            for (i = 0; i < nNodes; i++) {
                this->SetNode(aFaceTriangulation->Node(i+1).XYZ()/*, i + aPreviousNodeCount*/);
                aNextNodeCount++;
            }

            // Copy the triangles
            for (i = 1; i <= aFaceTriangulation->NbTriangles(); i++) {
                Standard_Integer iNode[3];
                aFaceTriangulation->Triangle(i).Get(iNode[0], iNode[1], iNode[2]);
                if (iNode[0] != iNode[1] && iNode[1] != iNode[2] && iNode[2] != iNode[0]) 
                {
                    if(aOrientation == TopAbs_REVERSED)
                        AddTriangle(iNode[0] - 1 + aPreviousNodeCount, iNode[2] - 1 + aPreviousNodeCount, iNode[1] - 1 + aPreviousNodeCount);
                    else
                        AddTriangle(iNode[0] - 1 + aPreviousNodeCount, iNode[1] - 1 + aPreviousNodeCount, iNode[2] - 1 + aPreviousNodeCount);
                }
            }
aPreviousNodeCount += aNextNodeCount;
}
ComputeLinks();

is this issue likely to do with how the memory is reserved by the function : this->SetNode(aFaceTriangulation->Node(i+1).XYZ()); or something else?