Hi,
The error it is showing is because u have not shutdown ur database and copied the datafiles to the other server.This error happens when u try to copy the datafiles from onse server to another without shutting down the database.
The remedy to the problem is shut down ur primary database ,copy the datafiles to the another server.Copy the datafiles to the same destination as the original one.If ua re changing the path then startup the instance and mount the database and change the path and open the database.
In case of any help please be free to ask to me at [email protected]


Regards,
Rohit Nirkhe,Oracle DBA,OCP 8i
[email protected]