Hi Fabio,
the "rules" and the "column" option of the GRASS-v.reclass module are
mutually exclusive. If you set both those options, the module fails to
execute and it will output the reported error message.
In the QGIS processing algorithm v.reclass there is a bug which prevents
the user to only specify the "rules" parameter.
So, if you want to use the GRASS v.reclass module through the QGIS
processing algorithm v.reclass, you need to workaround such bug.
You don't have to use the QGIS Python console (which I haven't advised
to use).
You need to locate the file named "v.reclass.txt" which is in the path
\apps\qgis\python\plugins\grassprovider\description\ or
\apps\qgis-ltr\python\plugins\grassprovider\description\ (depending on
you are using QGIS or QGIS LTR) inside the QGIS installation folder.
Then you need to edit such file using a text editor and change the line
as described before.
This way you can use the QGIS processing algorithm v.reclass specifying
only the "rules" parameter (and not specifying the "column" parameter)
and thus avoiding the error.
If you can't or don't want to make such modification of the
v.reclass.txt file by yourself, then you need to wait for the release of
the next QGIS 3.28 and 3.32 versions and use one of them, since a fix
for such bug is pending approval https://github.com/qgis/QGIS/pull/53643
and it will be hopefully available in QGIS 3.28.9 and 3.32.1 and next
versions.
Best regards.
Andrea
Il 29/06/2023 10:43, fabio castelli ha scritto:
Hi Andrea,
thank you very much for your support. Sorry, I'm new at this.
I've tried to print the code that you sent me in the Python console but
I get errors:
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