[Paraview] Stream Tracer Problem

[Paul Graham]

Hi Everyone,

I am unable to display a Stream Tracer and not sure what is going wrong.
After creating a vector field using the Calculator Filter, I added the
Stream Tracer filter using a point source seed (default setting).  The
point source  origin is displayed but nothing else.  Can anyone help me as
to what I have to do to get the stream lines to show?

Thanks in advance,

Paul
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