We have a site license for the WPF studio and most of the time when I build with the command line (msbuild, essentially), it works silently. Sometimes, however it pops up the license window. From that window, I can't tell exactly what's triggering it. On my own machine, that's annoying, but tolerable, but on our automated build machine (where the license is also installed), the same problem is a killer. We have both the Winforms and WPF site licenses installed. Is there a way to determine what precisely is causing the pop up to appear and fix the problem?