I recently upgraded my NSA-240 running SonicOS Enhanced 5.9.0.7-17o to a TZ 600 running SonicOS Enhanced 6.2.4.2-20n. I exported the settings from the NSA-240 and imported them into the TZ 600 and other than having to tweak the settigs for X8 and X9 that do not exist on the NSA-240 the configuration imported perfectly.
Since the system is new I have left the serial console connected to a computer so I can see if there are any messages. I am periodically getting the following message to the console and I can't find an explanation for what it means:
MOD_ATOM was overlapping (in_group) - same AO