plotmaker does seem to stress out easily. I'll try doing a save or save as. If those don't work, try minimizing it or reopening that same lbk.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"