The src lines you list are for freeing memory, not reading
from the file. The file read lines are
if (me == 0) grab(fp,file->nrho,&file->frho[1]);
if (me == 0) grab(fp,file->nr,&file->zr[1]);
if (me == 0) grab(fp,file->nr,&file->rhor[1]);
which is the same order they are listed on the doc page
for the file format.
Steve