[vtkusers] TaskParallel example problem [bad x server connection]

[n9693119 at mail.ncku.edu.tw]

Hello everybody:

I can rtn [TaskParallelWithPort] correctly~
But have problem with [TaskParallel] running...
Somebody help me please...
                             Regards steven

here is the error messages:
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[test at Chu2 bin]$ mpirun -np 2 TaskParallelism 

vtkMPIController 
I'm process 1 and will start task'2'work at y1
I'm process 1 and Finished task'2' 
I'm process 0 and will start task'1'work at Chu2
I'm process 0 and Finished task'1' 

p1_18814:  p4_error: interrupt SIGSEGV: 11 
ERROR: In /usr/local/vtk/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, line 1005 
vtkXOpenGLRenderWindow (0x846fbe8): bad X server connection. 

ERROR: In /usr/local/vtk/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, line 166 
vtkXOpenGLRenderWindow (0x846fbe8): bad X server connection. 
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