How do I exit from an FP Advise vi - cFP

Hi All, I am fairly new to compact field point and am attempting to setup an "on change" Digital Input event.
I have written some test code and I have had success in getting the core main functionality to work.
[For this concept code I have wired DO 1 into D1 1]
The problem that I have encountered is how to stop the "FP advise.vi" when I am finished with it.
The only example I could find was for LV 5.0 which I couldn't open.
http://zone.ni.com/devzone/cda/epd/p/id/2012
The vi help advises:
"Caution Do not use the FP Advise (Polymorphic) VI in nonreentrant subVIs".
I think that this is a clue, unfortunately, it is a bit too subtle for me.
Thanks In advance.
Tim L
iTm - Senior Systems Engineer
uses: LABVIEW 2012 SP1 x86 on Windows 7 x64. cFP, cRIO, PXI-RT
Attachments:
cfpIO.vi ‏17 KB

Thanks Deborah,
At this stage this is just a proof of concept VI.
The second FP Advise call was an attempt to cancel the the first one (a bit like swallowing a spider to catch a fly), It was just a guess.
The problem I have is that I cannot predict when the last loop is going to be called.
I am using the inputs for user interaction, When the operation has finished it is unlikely that there will be any more user inputs to allow the .VI to finish it's execution.
I had discounted FP Close because it used an FP refnum. I didn't realise it was a poly and works with the FP channels as well.
Thanks for that!
Added it to the code and got this message during deployment:.
Deploying FP Close(IO).viFP Close(IO).vi loaded with errors on the target and was closed.
LabVIEW: Failed to load shared library FPLVMgr.dll:ialv_releaseServer:C. Ensure that the library is present on the RT target. Use MAX to install NI software or FTP to transfer custom libraries to the RT target.
I have installed every possible library onto the device through MAX, Got any suggestions?
And for my next challenge, is there a way of using relative naming for the I/O ports.
I want to write portable code.
I am familiar with PC based systems and DAqMX and using property nodes to detect devices and available ports and combining them into portable code.
So something like: Localhost\cfp2220 @0\Digital Input 1.
I am finding the code and support for these functions appears to have be last updated in or before the LV7.1 Era and are now lying dusty and dormant.
Tim L..
iTm - Senior Systems Engineer
uses: LABVIEW 2012 SP1 x86 on Windows 7 x64. cFP, cRIO, PXI-RT

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