Verify Piipe Exists

I am trying to install a vendor application with an Oracle repository =
and not making much progress.   The install has failed and the cleanup =
requires that the pipe be purged and removed or the database be bounced. =
I've been through this four times since Friday afternoon.   I can't find =
any way to view whether or not a pipe exists.  I know its not a =
conventional database object and that its some sort of memory structure. =
 Is there a way to do this?  Where do I look?


This is what they gave me to remove the pipe.

declare ret number;=20
begin=20
dbms_pipe.purge('usernamePIPE_MASTER');=20
ret:=3Ddbms_pipe.remove_pipe(user||'pipe_master1');=20
end;=20



Don Freeman
Database Administrator 1
Pennsylvania Dept of Health
Bureau of Information Technology


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