Dividing two angles; still has unit

Hi,

I have a simple problem. In my parameter list I divide two angles by each other.

alpha = 45 [°]
delta_alpha = 0.01 [°]
number = alpha/delta_alpha

What I get is n is 2000.0 rad. This causes some trouble later on because this number has a unit. I tried to divide by [rad], but nothing changes. Any suggestions? It feels like a bug to me. If so, COMSOL pls fix that.

Gero