Ok ive come a little further. I changed the user to the administrator and now my output looks like this. D:\Program Files\PostgreSQL\9.1\bin>pg_upgrade -d "D:/Program Files/PostgresPlus /8.4SS/data" -D "D:/Program Files/PostgreSQL/9.1/data" -b "D:/Program Files/Post gresPlus/8.4SS/bin" -B "D:/Program Files/PostgreSQL/9.1/bin" -p 5432 -P 5433 -u postgres Performing Consistency Checks ----------------------------- Checking current, bin, and data directories ok Checking cluster versions ok Checking database user is a superuser ok Checking for prepared transactions ok Checking for reg* system oid user data types ok Checking for contrib/isn with bigint-passing mismatch ok Checking for large objects ok Creating catalog dump ok There were problems executing ""D:/Program Files/PostgresPlus/8.4SS/bin/pg_ctl" -w -l "nul" -D "D:/Program Files/PostgresPlus/8.4SS/data" stop >> "nul" 2>&1" Failure, exiting D:\Program Files\PostgreSQL\9.1\bin> What could be the reason that the server can't be started ?! -- View this message in context: http://postgresql.1045698.n5.nabble.com/Upgrade-Postgres-8-4SS-9-1-tp5151661p5151697.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general