Brian,
I can create HDF5 files OK with the windows install kit at
http://download.nexusformat.org/kits/windows/ ... though this kit is
based on a more recent revision of the NeXus source code than 3.0.0
looking at
http://svn.nexusformat.org/viewvc/NeXusCode/trunk/src/napi5.c?view=diff&
r1=721&r2=548&diff_format=h suggests no major changes to napi5.c between
this version and 3.0.0 that could cause an issue with H5Pcreate()
>From my understanding of the HDF5 manual H5Pcreate() should just create
you a new property list object, so I'm not sure why it should return you
an error as it looks like HDF5 is installed correctly on your computer.
Which compiler are you using?
The window install kit mentioned above contains an executable
napi_test-hdf5.exe ... are you able to run that on your computer (it
should produce a file NXtest.h5)?
Regards,
Freddie
-----Original Message-----
From: nexus-bounces at nexusformat.org
[mailto:nexus-bounces at nexusformat.org] On Behalf Of tieman
Sent: 30 November 2006 16:51
To: Nexus List
Subject: [Nexus] Trouble with HDF5 under Nexus3.0
Hello all!
I'm trying to update all my Nexus code to Nexus3.0 specifically so I can
make use of HDF5. I've been able to get HDF4 and XML to work fine, but
I get errors whenever I try and create an HDF5 file.
Specifically, the problem appears to be in this portion of the code from
the routine NX5open:
/* start HDF5 interface */
if (am == NXACC_CREATE5) {
fapl = H5Pcreate(H5P_FILE_ACCESS);
iRet=H5Pget_cache(fapl,&mdc_nelmts,&rdcc_nelmts,&rdcc_nbytes,&rdcc_w0);
rdcc_nbytes=(size_t)nx_cacheSize;
iRet =
H5Pset_cache(fapl,mdc_nelmts,rdcc_nelmts,rdcc_nbytes,rdcc_w0);
/*
setting the close degree is absolutely necessary in HDF5
versions > 1.6. If you use a lessere version and the compiler
complains, comment it out but keep this in mind.
*/
H5Pset_fclose_degree(fapl,H5F_CLOSE_STRONG);
am1 = H5F_ACC_TRUNC;
pNew->iFID = H5Fcreate (filename, am1, H5P_DEFAULT, fapl);
} else {
H5Pcreate (H5P_FILE_ACCESS) returns -1 which later causes H5Fcreate to
fail and I get a "cannot open file" error.
If I simply execute the code:
hid_t file_id; /* file identifier */
herr_t status;
/* Create a new file using default properties. */
file_id =
H5Fcreate("C:\\Development\\CBuilder2006\\NexusLibraryV5.0\\hdf5_test_fi
le.hdf",
H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
/* Terminate access to the file. */
status = H5Fclose(file_id);
taken from the HDF5 tutorial, I get an HDF5 file without problem. So I
believe I'm linked to HDF5 OK.
Any suggestions? I'm using the same routine to create files for HDF4,
HDF5 and XML. HDF4 and XML work fine--just HDF5 fails. I'm using
Nexus3.0 and HDF5-1.65.
Thanks in advance for any help!
Brian Tieman
Advanced Photon Source
Argonne National Laboratory
_______________________________________________
NeXus mailing list
NeXus at nexusformat.org
http://lists.nexusformat.org/mailman/listinfo/nexus