[vtkusers] why is vtk writer not closing files?

[Burlen]

Hi I have a application of vtk that process data files converting them into 
vtk format. I'm use the legacy writers and vtk4.4. For each file I process I

create some vtk data
pass data through delaunay filter
create a new writer
write data from delaunay filter
delete everything that was New()'d or Register(0)'d

however the writer seems to be leaving files open, a look into /proc/PID/fd as 
the program runs confirms that the files are piling up until ulimit -n is 
reached at which point I can't open anymore files. 

Any one run into to this before?? Any one know what the issue is?? how to 
fix??

-- 

Burlen Loring
Space Science Center
Institute for the Study of Earth, Oceans, and Space
University of New Hampshire
39 College Road, Durham, NH 03824
Phone: 603-862-1140