s as users in R are used to being able to
open files as often as they like. Furthermore, it is possible in HDF5 to
close the ID of a file without closing all objects in the file. Then,
however, the file actually stays open until the last ID pointing into
the file is closed and it cannot be opened again without it.</p>
<p>Therefore, as already explained above (and as recommended by the HDF5
manual), do not discard or close files that still have open objects in
them. It is preferable to keep the HDF5-file-id 