I think you may be getting a notifier error because the new notifier you added for component does not have its notifier reference wire run all the way through the loop in the "select component" case. It uses the default (an empty reference or Not a Refnum) which would cause an error when that gets fed into a notifier function. So wire that reference all the way through in that event and the case structure inside the event.
The complication with the auto loop is that now you have two wait for notications in it. So you need the component notifier to run in order to get the inner loops to run which only occurs when the select component button is pressed and that event structure runs. The auto notifier is also in the loop, so it will wait on that. It won't delay execution of the inner loops since it isn't driving anything but the indicator. But when the inner loops complete, the outer loop will be forced to wait on that notifier before the next iteration of the outer auto loop runs again. Which won't happen until the send command button is pressed again. (I'm not sure why you would need the cancel notifier function.)
Perhaps you should enter some timeouts into one or both of those wait on notifications so that they will run after a period of time and you don't have to wait for both notifications to occur. But if they both have a timeout, then you would have to handle that situation so that the loops don't run when you didn't intend them to. You would have to watch the timed out? boolean and only run the loops if one OR the other timed out? is true.
You may want to rethink the logic a little bit. Maybe it would be better not to have two separate loops for manual and auto. Put them into different cases within a single "Run" notifier loop that is based on what command it gets sent from up top rather than having commands sent into different notifiers. (I don't think you could have auto and manual phyisically occuring at the same time, but programmatically it could happen.) I wonder if you need a send control command and a select component command. Perhaps one "Perform test" button which takes the component and the auto/manual mode settings and sends that data to a single "test" loop.
I think you should worry about notifier errors. I thought the errors would be handled automatically (there is a setting in VI properites/Execution for it). The error wires are often used to enforce operation in series, but since in this case, there are several things happening in parallel, it gets complicated to merge errors, or handle them through numerous extra shift registers. Perhaps someone who is a higher expert in error handling can help and suggest something on this.
-Bill
