When I built abinit 6.4.1 today (with scalapack and without mpi-io), I was hit by line 3242 in src/51_manage_mpi/scalapack.F90,
3242: MSG_ERROR(G"MPI-IO support not enabled")
I guess the 'G' should not be there?
Browsing the source code on the web-page, it seems that the 'G' is also still in the trunk.
Keep up the good work!

/Mattias