Everything looks correct inside the XML and the only change here from a project that worked should be 'changing the tags the tank binds to and its position'.
If you don't get an answer on a post within several days, it is appropriate to add a "ping" comment to the original post. If you are in a hurry, open a support ticket.
It's slightly different, the old post was incorrect in symptoms and had the wrong XML, so I've flagged a mod to delete it.
If it would have been more appropriate to edit that post instead, I will do so in the future -- I'm used to forums where delete/add is the norm though, my apologies
I've run through a bunch of improvements to now end up with the following XML: nwindow.xml (25.5 KB)
It should just have the expression bindings for tank value and capacity changed (according to my internal differ,
Changes in o:
Removed: capacity expression binding to 10000
Added: capacity expression binding to {[default]Local_Tags/A1}+{[default]Local_Tags/A2}
Removed: value expression binding to {[default]1_A1-1_A10/1_A1}*{[default]1_A1-1_A10/1_A2}
Added: value tag binding to [default]Local_Tags/A1)