You can not do this with different patchset version. You need to create the new rac database then you can you export import. If the database is large use transport tablespace.
Hi Javier, Thanks for the quick response, is there any way to do it using RMAN. I mean RMAN restore and recovery instead of using duplicate command.
You not be able to use RMAN duplicate since it is a different version of the database software. You can use transport tablespace which does use RMAN.
You CAN restore an 18.104.22.168 database backup into an 22.214.171.124 ORACLE_HOME. You will need to upgrade the database (data dictionary) using catupgrd.sql from the 126.96.36.199.
Conversion to RAC will be done after completing the upgrade. Essentially, this consists of adding one more Redo Log Thread and one more Undo tablespace.
Hemant K Chitale