AutoCAD Civil 3D :: Fatal Error - Create COGO Point (2014)

I have a plugin that creates cogo points, and for some users it seems to crash every time, but for others it works just fine (as for myself, I have zero problems with it).  The subroutine is simple:

Using civLock As DocumentLock = acadDoc.LockDocument
Using trans As Transaction = db.TransactionManager.StartTransaction()
Try
Dim Location As New Point3d(PointX, PointY, PointZ)
Dim CogoPoints As CogoPointCollection = civilDoc.CogoPoints

[Code] .....
The fatal error occurs when the point is added, prior to the attempt to assign a raw description.  What is boggling me is that, like I said, it works flawlessly for me (and others) but not at all for some users.