You are not paying close enough attention. First, it is a waste of time posting a VI (ARGOS 500 Main) without posting the subVIs. You should realize by now that each subVI is a separate file.
Second, you obviously have not done any research on \ codes. That is not a LabVIEW only idea. When you have a string set for \ codes display, when you type a space character, for example, that space will appear as a \s. When you type a \s into a string set for normal display, that does mean a space but the separate characters \ and s. You did the latter. When you then changed to \ codes display, your \s would change to \\s. Still not a space and not what you are looking for. With the expected string set to normal display, just enter "Argos 500" without the quote marks. In your write string, make sure there is nothing at all like a \n after your *IDN?. Make those changes, save it, and run it. If it still fails, attach your modified VI.
Note that if you had actually copied a string from the serial example and pasted it, you would not have had the problem. You manually typed in the expected string not understanding what normal display and \ codes display mean.
