Fieldpoint Refnums

[John Morrissey]

I just started using FieldPoint and was wondering why I can't read
FieldPoint refnums from globals. I can successfully write the refnum
to a global, but when I read it out and feed it into the FieldPoint
Read vi, I get an error (32804 - An invalid IAHandle was
specified. : FP Read.vi).

In my application I want to open a session and write the refnum to a
global and then read it from the global with other VIs (as you can with
VISA and DAQ sessions). I want to avoid having to open and close my
sessions every time I need to make a reading because it seems to incur
a significant amount of overhead.
Any info would be appreciated.
--
John Morrissey


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Before you buy.

[Joji]

Use a functional Global instead. A functional global is a while loop that only runs once with an uninitialized shift register that holds the value. The problem you are running into is because a global VI has its own shared memory and you are trying to pass from one shared memory to another.