Error when entering template1 - Mailing list pgsql-general

I have been using postgresql (7.2.1-5) for several
years. Supprisingly, I've just got a problem when
doing pg_dumpall.
The error is :
psql: ERROR:  getTypeOutputInfo: Cache lookup of type
0 failed

This error also occurs when i enter to postgres using
this command:

psql template1

User which i used was postgres.

Can anybody help me to overcome this problem. I need
to dump all database since i want to upgrade to 8.0.3.

Thanks
Raufari



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