pg_dump

Hello everybody,

I would like to find out why the pg_dump command
doesn't work on my site.

Whatever I do the result is:

-- last builtin oid is 17184
-- reading user-defined types
-- reading user-defined functions
-- reading user-defined aggregates
-- reading user-defined operators
-- reading user-defined tables
-- reading table inheritance information
-- finding the attribute names and types for each table
-- flagging inherited attributes in subtables
-- dumping out user-defined types
-- dumping out tables
-- dumping out user-defined functions
-- dumping out user-defined functions
-- dumping out user-defined operators
-- dumping out the contents of all of 0 tables
-- reading indices information --------
-- dumping out indices
-- dumping out triggers

...and an empty file; obviously, the dumped databases are not empty.

Thanks in advance for your help and suggestions!