[vtkusers] Stream Tracer error

[pleramorphyllactic at navigo.com]

In paraview, I am getting the following error when trying to run the 
stream tracer filter on the icoFoam cavity tutorial:

ErrorMessage
# Error or warning: There was a VTK Error in file: 
../../../../../paraview-2.4.2/VTK/Filtering/vtkDemandDrivenPipeline.cxx 
(661)
 vtkCompositeDataPipeline (0x9284338): Input port 0 of algorithm 
vtkDistributedStreamTracer(0x92cf540) has 4 connections but is not 
repeatable.
ErrorMessage end

Any suggestions?
Thanks,
plera