Hi Roland,

Thanks again for your email.

> I have VisIt 3 and ETK Mayer downloaded which I believe doesn't have
> CarpetHDF5. How do I use the CarpetHDF5 reader? Do I need to install it
> from https://bitbucket.org/rhaas80/carpethdf5/src/multifile/ or is there a
> newer version?
That is still the newest version. Though I do not know of that version
will compile with VisIt 3 (it may have changed the plugin interfaces).

I had a look at VisIt 3.1
(https://github.com/visit-dav/visit/releases/download/v3.1.0/visit3_1_0.linux-x86_64-debian9.tar.gz
since I run Debian) and as far as I can tell that one includes the
CarpetHDF5 reader in
visit3_1_0.linux-x86_64/3.1.0/linux-x86_64/plugins/databases/libMCarpetHDF5Database.so

I installed VisIt 3.1.0 from the link. I tried running the visualization script with it and that gives me errors. The issue still seems to be about reading Carpet HDF5 files.

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VisIt: Error - VisIt could not read from the file "/afs/crc.nd.edu/user/a/akedia/simulations/nsnstohmns_in_saeng/output-0000/nsnstohmns/rho.xy.h5".

The generated error message was:

There was an error opening /afs/crc.nd.edu/user/a/akedia/simulations/nsnstohmns_in_saeng/output-0000/nsnstohmns/rho.xy.h5. It may be an invalid file.
VisIt tried using the following file format readers to open the file: <No suitable plugins were identified>
VisIt: Error - Cannot create a plot until a database has been opened.

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For assurance, I checked that the installed version of VisIt 3.1.0 has a folder on CarpetHDF5 in :

visit/3.1.0/visit3.1.0/src/databases/CarpetHDF5

Should this be the only folder with CarpetHDF5 created?

> As to s.screenCapture, it was by default set to 0 , I have attached a
> sample image.
> setting s.screenCapture = 1 gives empty images, so does not fix the problem.
I see. The first step will then be to try and see if you can load a
Carpet HDF5 file in the GUI to make sure that at least in principle you
should be able to load a file (as compared to there being a scripting
issue).

You should also make sure that when the script runs the file is
actually opened by CarpetHDF5 and not some other plugin that can read
HDF5 files (PIXIE is often doing this). I believe there is some output
to screen about which reader is used.

On trying to load a file on Visit GUI I get this error message:

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VisIt could not read from the file "/afs/crc.nd.edu/user/a/akedia/simulations/nsnstohmns_in_saeng/output-0000/nsnstohmns/rho.xy.h5".

The generated error message was:

There was an error opening /afs/crc.nd.edu/user/a/akedia/simulations/nsnstohmns_in_saeng/output-0000/nsnstohmns/rho.xy.h5. It may be an invalid file.
VisIt tried using the following file format readers to open the file: <No suitable plugins were identified>

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And when I'm selecting the file, there is no option for CarpetHDF5 in the dropdown list of supported file name/extension.

Thank you for your help,

Atul