Labview throws exception when trying to get properties of Class

Hi,

I have a rather large project that has an interesting problem.  

I have created a library with a lvclass inside.  it contains many vis, and controls.   When I right click on the class name and select properties Labview throws an exception and crashes!  If i right click on the class and select open the same thing happens.

Exception: Access violation (0xC0000005) at EIP=0x014EE4E6

Version: 15.0.1f1 (32-bit)

Possible Cause: C:\Program Files (x86)\National Instruments\LabVIEW 2015\resource\Framework\Providers\LVClassLibrary\libpropPage_Probes.vi

The Control for the class opens fine, and the code runs fine.  I can create an installer as well.

Any ideas what I should be looking at to solve this?  My company will not let me post the code, but I could perhaps post sections.