DLL ImportError for h5py

[Andreas Janz]

h5py is an optional dependency required for reading PRISMA products.

Installing h5py via the EnMAP-Box PIP Package Installer causes problems unter QGIS for Windows.

1. You need to manually delete the PIP installation of h5py from your user folder, e.g.
   C:\Users\USER\AppData\Roaming\Python\Python39\site-packages\h5py
2. Run the OSGeo4W Setup and install h5py package:

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[Andreas Janz]

In future versions of the EnMAP-Box, the h5py installation via PIP will be blocked:

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[Giuseppe Colacicco]

I have installed the h5py package since the Osgeo4w Shell setup but when I go to the Appdata folder I can’t find the installed folder and so it always gives me the same error (DLL ImportError for h5py) when I try to convert data to enmapbox.

[Andreas Janz]

Hi Giuseppe,

let’s have a video call with shared-screen for getting this solved. Just write me an email ([e-mail]).

[Giuseppe Colacicco]

As you can see from the second image, it is still the old installation of the h5py package. The newly installed folder from the setup does not appear.

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[Andreas Janz]

You need to manually delete the h5py folder here:

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Have you done that?

[Giuseppe Colacicco]

Should I delete it before installing the new h5py package ?

[Andreas Janz]

It doesn’t matter. This version of h5py was created by the EnMAP-Box PIP Installer, which causes all the problems. Just delete this folder:

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The OSGeo4W Setup installs h5py into another folder below your QGIS folder, e.g.
C:\QGIS3.22\apps\Python39\lib\site-packages\h5py

Now your QGIS should use the correct h5py version. You can check this in the QGIS Python Console:

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[Giuseppe Colacicco]

Perfect, I managed to solve. I really thank you very much for your help. You were very kind.

[Andreas Janz]

You are very wellcome .
And also, solving Python dependencies in QGIS can be very frustrating from time to time

[Giuseppe Colacicco]

Yes, I notice that.

[Tom Flipsen]

Hi Andreas,

I am also struggling with this issue. I have deleted the h5py map from Appdata\Roaming\Python\Python39\site-packages\. Then, I used the OSGeo shell to reïnstall it. I checked it with the Python Console in QGIS:

Which shows it is installed in the right location. However, when I try to load PRISMA data, I still get an error:

(QGIS 3.22.3, EnMAP-Box 3 3.920211123T125541)

[Andreas Janz]

Oh no, you are one of the rare cases, where even this workaround fails.

I changed the PRISMA IO for the next release. If you want to test it:
https://bitbucket.org/hu-geomatics/enmap-box/downloads/enmapboxplugin.3.10.0.20220222T163058.TEST.zip

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[Gabriele Delogu]

Hi Andreas,

I have the same problem as Tom Flipsen when I try to load PRISMA data. The source you linked is no longer available. Could you help me in some way?

Thanks in advance!

Gabriele

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[Andreas Rabe]

The source you linked is no longer available.

Please update to QGIS 3.28, install the EnMAP-Box v3.11 and try again.

[Gabriele Delogu]

Ok, I have no more errors by importing PRISMA L2D with QGIS 3.28 and EnMAP-Box v3.11

Thank you very much for your help!