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Just for the record, the definition string is read as ‘NXSPE’ in NeXpy (on Mac OS X). It doesn’t address the main issue, which is whether the NeXus API is handling this correctly, because NeXpy uses h5py, but there’s no problem with this particular string.
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<div>As an aside, the file doesn’t contain any axis definitions (even though the axes are there), which I’ve seen before with NXSPE files, and has the NXfermi_chopper group outside the NXinstrument group, which I haven’t seen. I know that Andrei Savici has
modified the NXSPE definitions within Mantid, but I don’t know if they are part of a release yet. I had some discussions with the Mantid developers at Oak Ridge recently about making standard procedures to export Mantid workspaces as valid NeXus files, so
hopefully, these kinds of issues won’t be a problem soon.</div>
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<div>With regards,</div>
<div>Ray<br>
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<div>On Oct 13, 2014, at 12:07 PM, <a href="mailto:Tobias.Richter@diamond.ac.uk">
Tobias.Richter@diamond.ac.uk</a> wrote:</div>
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Hi Owen,<br>
<br>
What version of NeXus are you using?<br>
The NeXus API was expecting strings to the padded with "\0". Or you could call that an off-by-one error.<br>
<br>
I think I may have fixed that in the master branch on github. Please check with that and report.<br>
<br>
Regards,<br>
<br>
Tobias<br>
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<blockquote type="cite">-----Original Message-----<br>
From: NeXus [<a href="mailto:nexus-bounces@nexusformat.org">mailto:nexus-bounces@nexusformat.org</a>] On Behalf Of<br>
<a href="mailto:owen.arnold@stfc.ac.uk">owen.arnold@stfc.ac.uk</a><br>
Sent: 13 October 2014 17:12<br>
To:<span class="Apple-converted-space"> </span><a href="mailto:nexus@nexusformat.org">nexus@nexusformat.org</a><br>
Subject: [Nexus] File::getStrData issue<br>
<br>
Hi,<br>
<br>
On OSX, only, for the NXSPE file here<br>
<a href="https://drive.google.com/file/d/0Bx07Hfz4WgYMSDAyQXpVbkE5WUk/view?usp=s">https://drive.google.com/file/d/0Bx07Hfz4WgYMSDAyQXpVbkE5WUk/view?usp=s</a><br>
haring, the test program fails to properly extract the string data. It<br>
should print out NXSPE, but it prints NXSP instead!<br>
<br>
The file looks fine in HDFView, I'm not sure why it can't be extracted<br>
properly via the APIs on OSX. Other files of this type do give the the<br>
string correctly. If the field is corrupted, I don't know why the nexus<br>
libraries on other OS version are OK with this.<br>
<br>
Thanks in advance,<br>
Owen.<br>
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Scanned by iCritical.<br>
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<div apple-content-edited="true">-- <br>
Ray Osborn, Senior Scientist<br>
Materials Science Division<br>
Argonne National Laboratory<br>
Argonne, IL 60439, USA<br>
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