Saving in hdf5save creates an unreadable file

Question

I'm trying to save an array as a HDF5 file using R, but having no luck.

To try and diagnose the problem I ran example(hdf5save). This successfully created a HDF5 file that I could read easily with h5dump.

When I then ran the R code manually, I found that it didn't work. The code I ran was exactly the same as is ran in the example script (except for a change of filename to avoid overwriting). Here is the code:

(m <- cbind(A = 1, diag(4)))
ll <- list(a=1:10, b=letters[1:8]);
l2 <- list(C="c", l=ll); PP <- pi
hdf5save("ex2.hdf", "m","PP","ll","l2")
rm(m,PP,ll,l2)  # and reload them:
hdf5load("ex2.hdf",verbosity=3)
m        # read from "ex1.hdf"; buglet: dimnames dropped
str(ll)
str(l2)

and here is the error message from h5dump:

h5dump error: unable to open file "ex2.hdf"

Does anyone have any ideas? I'm completely at a loss.

Thanks