pg_dump: SQL command failed

[kaywin]

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 = 'dbname'

Can anybody suggest to take the backup??

[rski]

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 = 'dbname'

Can anybody suggest to take the backup??

What postgres?
What command did you run.