Question: FlowLine (VectorCalculus): No Non-Zero Vectors Found?

Hi everyone.

I'm trying to visualize some some field lines for a 3D magnetic field I have simulated, and I have read that the Student[VectorCalculus] package is the best package for this type of visualization. I tried implementing it as described online and in the manual, and I got an error:

Error, (in plots/fieldplot3d) no non-zero vectors found


Does anyone have any ideas as to what could be causing this issue?

Attached is the Maple document I am using. The section entitled "Problem Area" is where the issue is.

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