"cachepwd has to be the pwd of the oracle user defined for cache administrator in the oracle db."
From the information you've provided, it looks like -cacheuid is a user with ADMIN privileges in the TimesTen datastore. Are you certain this is the CACHE ADMINISTRATOR user defined in TimesTen and on the Oracle database?
-cacheuid ttorauser -cachepwd timesten
A CACHE ADMINISTRATOR user in a TimesTen datastore is not the same as a regular user given ADMIN privileges. Try running
select * from sys.dba_sys_privs
to see who it says is the CACHE_MANAGER. I think this is probably the user you need to use for -cacheuid. You should check what Oracle password this user has for the argument to -cachepwd
The TT8179 wuld be happening because it looks like the Standby datastore is already existing when the -duplicate is run preventing the -duplicate from creating the Standby datastore itself.