You attached a 0 byte file but if the last example is like the first one, you have the inputs swapped. For example, you have 55 wired to the upper limit and 84 wired to the lower limit. Simply looking at the tool tip or having context help on would have helped. You might also look at whether you want the upper limit included. The default is not. The little black square at the input indicates whether it is or not. If you want 84 to be a valid input, you need to right click the function and select Inlcude Upper Limit. Conversley, if you want 55 to not be inlcuded, you would have to right click and deselect Include Lower Limit.
