pg_dumpall not working in batch

Hi all,

I've recently posted here some question about pg_dumpall (7.2) on
Solaris8.
Investigating, I reduce my problem cases.

When I plan in crontab 'pg_dumpall > dball.sql', I receive this error:
connected to template1...
ld.so.1: /usr/local/public/pgsql/bin/psql: fatal: libpq.so.2: open
failed: No
such file or directory
Killed

But, when this same command 'pg_dumpall > dball.sql' is typed
interactively,
this is well working.

Thanks for idea.

--
Serge Obeuf
DISI/SI