Tom , hi
accepted as solution as answered my question but as it turns out i did not need it..
The main issue was caused by me not being able to use the xml configuration file because it did not contain the objects from Panorama so initial commit was failing. after reading up it was suggested that you are better off to "export device state" as this captures all realtime settings... it was the import of this that was causing errors and on 2 of our 8 gateways I could net get the config on there at all... so gave up as your solution is for xml and config state is different format..
so... I simply removed device from Panorama, selected the keep all objects option, exported and imported with no issues... well apart from the fact that i had ethernet1/12 as a test DMZ link and of course the 450's only have 8 interfaces but easily fixed.
Just an FYI and thanks again for your time.
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