I performed Shutdown Immediate in Oracle 8I and now I am unable to mount the database.
I’m getting the following message: “ORA-01102 Cannot mount database in Exclusive mode”
I only have one database running on this machine. It was automatically created by Oracle installer upon installation of Oracle software. I can no longer connect via SQL * Plus,
Only through Server Manager (connect internal) Please advice on how to fix this. I am new at this so detailed advise is highly appreciated.

Thank you for your help,