Yeah sure...

Well we use oracle in my company and on it we create a user called opera, so when i logged in to try and do the mount mode i was login in as the sys user but in the opera schema... i found out that if i excluded the opera schema name and just loged into oracle with the sys user then i was able to preform the task.

I hope that you know what i mean...

this was what i did in the first run that did not work:
sqlplus "sys/xxxxx@opera as sysdba"

then i found out that login in like this logs you directly into oracle and not into the schema:
sqlplus "sys/xxxxx as sysdba"

simple, but not when you have tried a 100 options hehe

Best regards

Jesper