Thanks Milk. That removed the errors but the label Divide04 is still not the correct width. The results of Divide04Width $resolutionX-SystrayCurrentWidth-Divide04X-20$ are as if SystrayCurrentWidth is equal to 0. Maybe it is? When an icon is added or removed it has no effect. Any other ideas?

My code is still the same as above with the exception of adding SystrayCurrentWidth 0.