Pl/PGSQL error

Greetings,

    I have been developping a small DB system mixing libpq and
PL/PGSQL. Recently I tried to extract the system from a Postgres
7.1/RedHat 6.2 tar file to a Postgres 7.1/RedHat 7.2 and a few errors
regarding the PL/PGSQL instalation have been happening. The first one was
fixed by redoing the CREATE commands for the language, but then another
one happened and I can't seem to figure out how to get around it:

ERROR:  fmgr_info: cache lookup for language 114594 failed

    Any clues? Thanks in advance!

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