Slow Apply on Logical Standby due to SYS.AUD$

Struck a problem today with Logical Standby due to SYS.AUD$.

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Data Guard Planning

I am still having problems with setting up Data Guard. I think my problem has been that I am attempting the more complex configuration (RAC) first.

To overcome this, I am trying to set up a physical Data Guard configuration using the RMAN catalogue with the primary on RMANCAT and the standby on RMANDOG.  This should be easier as this is a single instance to single instance configuration.