I've oracle 9i installed on a standalone windows 2000 server. I created one additional test database on the server with a separate instance for testing purpose. I shutdown the first instance and then start other instance with a separate init.ora file. First time I was able to open the test database, but after a reboot, I've not been able to open the test database. I shutdown 1st instance, startup nomount 2nd instance, then mount the test database, but when I give the commend "alter database open;" I get the error message "ora-01092: Oracle instance terminated. Disconnection forced." I checked init.ora file. listener, tnsnames.ora, service, but couldn't find any problem. I didn't give any shutdown abort commands either.