[gmx-users] error in installation

[Fabio Affinito]

Hi,
I installed Gromacs 3.2.1, but i got this error message when I try to 
run grompp_d:

grompp_d: relocation error: /usr/local/lib/libfftw_mpi.so.2: symbol 
errno, version GLIBC_2.0 not defined in file libc.so.6 with link time 
reference

What does it means?

Thanks
Fabio