Hi Eric. I don't think I can offer any help for this one, hopefully someone else can 8-) If you know the exact Koha version you have (More > About Koha > Server information tab > Koha version), I could send you a list of the defaults for all the system preferences. Alternatively, if it is a relatively recent version, you could use one of the demos to identify what is missing https://koha-community.org/demo/ It would be a bit tedious though! (And might not resolve the cause of the issue.) Another thing to check in the database is the number of system preferences: select * from systempreferences; (for the current main there are 897 system preferences). Depending on badly your Koha is 'borked', another alternative may be to export your record data and import it into a fresh instance (depending on how much you have customised the frameworks and other administration options). David On Tue, 13 Jan 2026 at 15:00, Eric Lease Morgan <eric_morgan@infomotions.com> wrote:
How do I resolve the following two errors when additional-contents.pl?category=news is called:
Use of uninitialized value $interface in concatenation (.) or string at /usr/share/koha/lib/C4/Languages.pm line 122.
Use of uninitialized value $theme in concatenation (.) or string at /usr/share/koha/lib/C4/Languages.pm line 122.
A long time ago I submitted the wrong CLI command at the wrong time, and I believe I blew away many of Koha's preferences. Since then I have been able to re-create a new super librarian, and thus I have regained access to the administrative backend. Whew!
Now I want to use the Tools functions to create news. Apparently the command to do this is:
<address>/cgi-bin/koha/tools/additional-contents.pl?category=news
Unfortunately, when submitted, the adminstrative interface returns HTTP error 500, and the error log includes the following two diagnostics:
Use of uninitialized value $interface in concatenation (.) or string at /usr/share/koha/lib/C4/Languages.pm line 122.
Use of uninitialized value $theme in concatenation (.) or string at /usr/share/koha/lib/C4/Languages.pm line 122.
Languages.pm seems to be called from additional-contents.pl and the error seems to stem from the getTranslatedLanguages method.
Where do the values for $interface and $theme get initialized? Maybe something in my database needs to be reset? I'm stumped, and any help would be appreciated.
-- Eric Morgan Infomotions, LLC
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