>Thanks for your great help. After I added the Print, I got the following
>result:
>
>"Field. 0 components."
>
>What's the problem?
>
>yuzhong
>
No current Pick.
Turn on Execute on Change, keep the Message Window where you can see it,
then Pick on the object in the Image window. When you hit it, you'll get
output. When you miss, you get the above. I guess you've figured out how to
bring up the View Options window, choose Pick mode, and select which Pick
module (by name) you are trying to drive (in case there is more than one
currently in the net: note that you can rename the module in the net and
your name will appear in the View Options dialog too).
Looking ahead, when you drive a net with a Pick and the Pick is
non-existent, as when you first open and run the net again (and haven't
made a Pick yet), you'll get an annoying error probably. You can use
Inquire("is not null") or ("is not empty") (I can't remember which is
correct at the moment) to drive Route's first input; send the Pick output
also into Route's 2nd input, then Route's output to your downstream
processing. This acts as a safety switch that turns off downstream
processing if in fact the Pick is currently null (or empty), but passes it
when there is a valid Pick object.
(I'm sending this back to the list in case any lurkers want to know the
answer).
Chris Pelkie
Vice President/Scientific Visualization Producer
Conceptual Reality Presentations, Inc.
30 West Meadow Drive
Ithaca, NY 14850
[EMAIL PROTECTED]
(607) 257-8335 or (607) 254-8794
