Resetting Parameters during RMAN DUPLICATE FROM ACTIVE DATABASE SPFILE

Hello,

Duplicating a database from RAC to a single instance using RMAN DUPLICATE FROM ACTIVE DATABASE with the SPFILE option works fine. Also setting and resetting parameters works but unfortunately not for all parameters.

For example:

(...)
set db_recovery_file_dest_size='59055800320'
set cluster_database='FALSE'
reset fal_client
reset fal_server
(...)

works. But I don’t know how to reset instance specific parameters like thread.

Kind Regard
Oliver.