displaying minutes elapsed

[Grass_Pitch]

I am trying to write a Vi that does a whole bunch of other things while providing the user a clock which shows the seconds and minutes elapsed since the vi was started. I am running into trouble with the formula node - can any one say what is wrong with the vi? I have stripped all other functions and shown only the relevant parts. Thank you.
KB

[Dr._Imad]

use
mod((X1-X2),6000)

[Dennis_Knutson]

Why don't you just use the Elapsed Time function? You can either display elapsed time as a numeric or as a string (days hours:minutes:seconds).