> Hmmm, you do have mpfr 2.2.0, right? Check the mpfr.h > file for version info. ... /* Define MPFR version number */ #define MPFR_VERSION_MAJOR 2 #define MPFR_VERSION_MINOR 2 #define MPFR_VERSION_PATCHLEVEL 0 #define MPFR_VERSION_STRING "2.2.0" ... Dominique