Right-clicking a subVI and selecting "Find all instances" is extremely useful. However there is currently no way to filter the results by a particular input or output being wired in the caller VI.
My proposal is: It would be great to be able to filter by a particular input or output, or a particular combination of inputs and outputs, being wired in the caller (i.e. being used by the caller) when using "Find all instances". There are multiple ways of exposing such a filter to the user, so I won't attempt to mock up a design here.
Background
Recently I refactored parts of a medium-size LabVIEW project that I was working with for the first time. As part of the refactoring I wanted to remove an output of an FGV-type subVI with multiple inputs and outputs, because I suspected that that output was unused by any of the callers. Using "Find all instances" I found around 60 instances where this subVI was called. I had to Ctrl + G through the results list and check that the output I wanted to remove was not used in any of the callers. This would have been simpler if I could have set a filter condition to this effect, as the search would have returned only those callers that were using that output. In this case, the search would have returned 0 results, thus confirming that the output was unused.
Side-note: You are probably thinking "You could have disconnected the output terminal from the connector pane, and used the Error List (broken run arrows) to find the broken callers." That's what I intended to do before I realised that virtually all of the caller VIs were dynamically called VIs. Therefore those VIs being broken wouldn't have broken the main VI of the app. I put those dynamically called VIs into the disabled case of a Diagram Disable Structure such that they were loaded in memory and "Find all instances" would search inside them.
Thanks
