@DCGN2
First - what is the error you are seeing?
Next, lclCurrentKey was a context variable that you were to put in the OnSelect of your icon. If you followed my steps, you would have first received the error that it was invalid...that was okay as putting the formula in the Icon OnSelect would resolve that. Perhaps I should have told you to do the formula on the OnSelect first...oh well.
So, you didn't mention that you have a Gallery that the user comes into the EditForm from.
If that is the case, then you would probably want to base your edit form and "next" navigation off of the selection in the gallery.
If so, then, on your Gallery OnSelect property (before your navigate statment) put in a Set(glbCurrentKey, ThisItem.Key)
Now, on the Icon OnSelect property, put this formula - Set(glbCurrentKey, glbCurrentKey + 1)
Now in the EditFirm Item property, put this formula - Lookup(IntoolsTracking, Key=glbCurrentKey)
That should give you the next navigation you want - but again, no maximum record checking and all assuming that Key is numeric.