In R2015a, the BorderGroupCount member variable in the GLStars class does not appear to be initialized anywhere. In a debug build in VS2013, GLStars::ReadBorders thus crashes when indexing an array using this variable. This can be seen when initially opening an OrbitView.
It seems as though the existing code expects this variable to be initialized to 0 before ReadBorders does any work. A patch is attached that fixes the issue.