Hi, > On 26. Sep, 2020, at 11:42, Paul Förster <paul.foerster@xxxxxxxxx> wrote: > > the two things I forgot to mention are: > > a) the versions I will be upgrading from are 11.9 and 12.4. The above thing happens with 12.4. Since I didn't check 11.9 yet, I cannot say if it appears there too. > > b) the 12.4 software also does not have plpython2 files in its lib64 directory. Both only have plpython3.so: > > $ ll /data/postgres/*/lib64/plpython* > -rwxr-xr-x 1 postgres dba 151672 Aug 13 16:28 /data/postgres/12.4/lib64/plpython3.so > -rwxr-xr-x 1 postgres dba 151544 Sep 26 10:38 /data/postgres/13.0/lib64/plpython3.so > > Any help would be appreciated. Thanks very much in advance. seems, I found some kind of solution: - before running "pg_upgrade --check -k": drop extension plpythonu; - run pg_upgrade - after the upgrade: create extension plpython3u; Is this the correct way? Cheers, Paul