Trying to create multiple state machines out of same VI to monitor each cFP channel results in what seems to be shared memory between machines

Question

Hi,
I'm trying to create a state machine which monitors a single channel on a field point. I want to monitor up to 64 channels at a time, each one with different instances of the same VI. The VI itself needs to maintain information mainly through feedback nodes both in its own block diagram and subVIs within. 
All instances of this VI will be executing inside a main loop as they do not execute loops of their own as this would create 64 threads on the cFP-2200 we're using which I believe would be too much.
My attempted solution to all of this was to make the Channel Monitoring VI along with all SubVIs reentrant and "pre-allocate" for each instance. This does not seem to help as each VI seems to maintain the state of the one which ran before. Maybe I'm missing a step?
Is there a better way to approach this problem without writing a separate VI for each channel and the maintenance headache that would cause?

Answer 1

Hi Ben,
I actually read your document for another puzzle and it worked well, I think largely because it involved subVIs which were meant as separate threads. In that case, I used methods to alter inputs while the VI was "running."
In this case, as you know, my SubVIs are not looping inside, they are instead single calls but they do need to maintain the state at the end of their previous call, adding to the data they're tracking after they are called subsequent times. I tried the "call by reference" to call them each time. Below is a screenshot of the VI used to create the occurances and a SubVI used to execute each occurance, this subVI is embedded inside a while loop which I did not show here:
In running my tests, there still seems to be some data sharing of internal variables and feedback nodes between the SubVIs I'm calling, which I do not want. Am I approaching this in the correct way? Is what I'm trying to do even possible?