Problem one:
I have an oracle enterprise edition 8.1.6 with three instances. I want to remove one instance without harming the other. I have stopped the services for the extra instance but I want to remove it.

Problem two:
Also, since I created the second and third instance, I can no longer run my bat file which does an export at night to be backed up to tape. It ran without failure until I added the new instances. The error that it gives me in incorrect username and password. I use the full global username. I can do an export mannually just using the exp command and it works fine with the same usernames and passwords.

I have created a passwordfile for each with entries=5 and also commented out remote_logon_passwordfile=exclusive in the init.ora

HELP!