cache lookup failed for type - Mailing list pgsql-admin

 I'm doing a very simple thing...

creating a schema xyz;

creating domain xyz.abc; (about 100)

creating table xyz.def' (abour 100)

then

drop schema xyz cascade;


after a list of
NOTICE: drop cascade to type xyz.aaa
.
.
.
I got
ERROR: cache lookup failed for type 12345

I thing that maybe there is(are) parameter(s) that need to be configure to give more cache to prevent this error

can you help me ?