NONMEM problem with gcc/gfortran 5.0 under Mac OS 10.10 Yosemite

Dear all, I encounter a problem after upgrading my mac to Yosemite. I also renew the gcc/gfortran from 4.8 to 5.0 version as Yosemite can't support gcc/gfortran 4.8 well. But there is always a note presented every time when I run NONMEM as follows: Note: The following floating-point exceptions are signalling: IEEE_INVALID_FLAG IEEE_DIVIDE_BY_ZERO ​which I've never seen before​. I'm sure there's no wrong with control stream. Have anyone ever seen the situation before? Sincerely,​ -- *Ting-Jie GUO* Group of Pharmacometrics, Peking University, China.