I need to communicate with multiple identical instruments on different serial ports simultaneously. I have a set of vis that are the building blocks for communication, and they are all reentrant. I then have a top-level reentrant vi that is called multiple times with different VISA resources as inputs. That works fine, and I can see the multiple clones running, but the sub-vi calls from within that one are not being called in a reentrant manner, so each instance still has to wait for the others. I read that in older versions of LabVIEW you could not call a reentrant sub-vi from a reentrant vi. Is that still true in 8.6? If so, all my work to make these nice little building block sub-vis seems to be a waste. Do I have to use one reentrant vi that has all the sub-vi stuff unbundled and flatened out onto a large block diagram? If I replace sub-vi calls with reentrant calls by reference will that work? It is messier than a simple sub-vi call but not as bad as unbundling everything.
