Oracle Error Message
ORA-19838: Cannot use this control file to open database
Reason for the Error
This control file was restored by a DUPLICATE operation used only to restore and recover the datafiles of the new database. It is not meant to be used for opening the database, as allowing so might corrupt datafiles or online redo logs of the target database or both.
Solution
Re-create control file manually specifying all names of datafiles and online redo logs. Do not forget to use NID to change the name or DBID or both of the new database.