I get error 1055 "Object Reference Is Invalid" when I try to write to a property node

Hi, I'm trying to get these results to be displayed in two tables now, where I originally had them being displayed in just one. Outside of the attached vi, I can just copy the value property from one table to the other after this vi has run, and the table values appear properly. The problem with that is, that any table property I assign (changing background colours to be exact), is not considered part of the value property, and thus isn't copied when I copy the value from one to the other.
The thing I can't understand is that the second set of property nodes (at the bottom), give me the "Object Reference Is Invalid" when I added them. I've tried everything I can think of, but can see no logical reason why I get that error for those two, while I don't get the error for the top two (not wired to constants).
Any help on this would be much appreciated. Thanks
Geoff
Attachments:
Table Display Testing.vi ‏396 KB

The logical reason that you're getting that error is that you are not passing in a reference to Table In Two. The control is not wired to the connector pane so you are not getting a reference from the calling VI.

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