The output sql file will fail if the mfr switches are used. parallell_pg_loader writes the following to the end of the sql script:
SELECT reporter.enable_materialized_simple_record_trigger();
SELECT reporter.disable_materialized_simple_record_trigger();
This fails because the enable step tries to create the bbb_simple_rec_trigger which already exists. I believe the purpose of these two statements is/was to speed up the loading of records in the COPY statement by removing the trigger action that would otherwise run on each row being added. I moved the script bits around so that it first disables the trigger, then runs the COPY statement, then re-enables the trigger and rebuilds the table.
Committed a possible fix here:
http://git.evergreen-ils.org/?p=working/Evergreen.git;a=commit;h=f837691c132802faaf3306e8ea4c93b5f052c033
This bug is present in the 2.3.0 release tarball and will trip up anyone trying to import MARC records by following the standard import instructions.