Custom Property Tab Performance Issues

Anyone experience perfomance issues after configuring the custom properites tab?  I just set up  our part, asm, and drw templates to encorporate the custom properties tab.  I do reference an Exel spread sheet for the properites.

One user gets a memory resource error and crash when exporting an STL file.  If he changes his system settings to not use the custom properties, the issue goes away.

Any ideas?

SolidworksGeneral