[vtkusers] Null vtkFloatArray pointer in vtkPoints::vtkPoints()

[Selvig, Andy]

VTK Users-

I'm having an issue creating vtkPoints. Here's my setup:

Windows XP, MSVC2005
VTK 5.0.3 dll debug

Basically, vtkFloatArray::New() is creating a null pointer in
vtkPoints::vtkPoints() :

// from vtkpoints.cxx, line 56
vtkPoints::vtkPoints(int dataType)
{
  this->Data = vtkFloatArray::New(); // value returned here is
0x00000000
  this->Data->Register(this); // access violation raised here
  this->Data->Delete();
  this->SetDataType(dataType);
...

Understandably, an access violation is caused when a method is called on
Data. I don't understand what would cause a constructor to return a null
pointer. This particular constructor is called several dozen times
before this error occurs. Here's the last chunk of my code in the stack:


	// create the points
	points = vtkPoints::New(); // error here
	points->SetNumberOfPoints(nPoints);
	points->SetData(gridData);
	gridData->Delete();

	// create the polydata
	gridPolyData = vtkPolyData::New();
	gridPolyData->SetPoints(points);
	gridPolyData->SetLines(cellArray);
	points->Delete();
	cellArray->Delete();

	// create mapper and actor
	m_gridMappers[i]->SetInput(gridPolyData);
	m_gridActors[i]->SetMapper(m_gridMappers[i]);
	gridPolyData->Delete();


The error happens on the first line. This whole chunk is inside a loop
that executes several times before the error. gridData and cellArray are
a vtkFloatArray and vtkCellArray that keep being re-instantiated each
time through the loop. m_gridActors and m_gridMappers are arrays of
vtkPolyDataMappers and vtkActors.

Does anyone know why something like this would happen? Thanks in advance
for your help.

Regards,

Andy Selvig