In the particular example posted, you don't need the Merge Errors.vi at all because there's no reason to merge a guaranteed "no error" with the other error stream.
Or, to phrase it another way: BOTH "ERROR OUT" TERMINALS RETURN THE SAME VALUE. So you never have to merge these two error streams. Automatic error handling is satisfied if you wire either one of these two error terminals.
The comment that the automatic error handling is satisfied if one of the two terminals is connected seems incorrect. Please see the image below. I have tested this both in 2015 and 2017.
The errors are the same at this point in time, but I don't think there's any guarantee that that will not change in the future. I plan to always connect both.
DVR Error Handling
in LabVIEW General
Posted
The comment that the automatic error handling is satisfied if one of the two terminals is connected seems incorrect. Please see the image below. I have tested this both in 2015 and 2017.
The errors are the same at this point in time, but I don't think there's any guarantee that that will not change in the future. I plan to always connect both.