Hi Is this call thread safe? Rast_get_row(fds[j], rowbuf, row, maptype); I've been getting error while trying to put it in an OpenMP loop: Also same question about this two calls: ptr = G_incr_void_ptr(ptr, Rast_cell_size(maptype)); maptype = Rast_get_map_type(fds[j]); Thanks, Peng