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Postgres backup error

 
Greenhorn
Posts: 4
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Hi!

I have a postgresql 7.4.2. When i try to use pg_dump i
get the next error:

pg_dump: saving encoding
pg_dump: saving database definition
pg_dump: SQL command failed
pg_dump: Error message from server: ERROR: relation "pg_user" does not exist
pg_dump: The command was: SELECT (SELECT usename FROM pg_user WHERE usesysid = datdba) as dba, pg_encoding_to_char(encoding) as encoding, datpath FROM pg_database WHERE datname = 'db'


How can i take the backup.
 
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