Corridor Modeling template error when editing existing points.

I am having an issue that I can't seem to resolve.:

When I RT click on an existing point  and choose "Edit Point" the  "Point Properties" dialog box opens and is completely blank. It doesn't matter which point I choose I get the same result. After I chose to close the dialog box I receive a Microsoft.NET framework error message box that states " unhandled exception has occured in your application". It only seems to happen in this file. If I open the *.itl file while I am in a different *dgn file I have no problem editing the point. This happened a few weeks ago and ended up restoring the *.dgn file from a backup and the problem went away. I assumed that I somehow corrupted the file and moved on, but today, It has happened again. 

Any suggestion on some things that I can check?

I have checked this on other workstations and I get the same result.

MS 8.11.09.714 (SS3)

Geopak 8.11.09.845 (ss4)

FDOT ss4