[marccenter]

Good call, Mark McLeod!.
I had issues initially, but based on past work experience, removed the old C ompiler and installed the new C compiler and errors went away. Some experienced computer users do this as a matter of SOP (standard operating procedure). Removing the old compiler program as completely as possible and installing the new MPLAB C-compiler may be your ticket to solving this kind of problem is good advice for high school students and for those of us who are a few year's removed from high school!