Please help !!
I don't know what I am doing wrong
I have spent all day trying to make progress in therm
I can see how useful this software could be, but I am struggling so much to build basic geometry that doesn't give gap & overlap issues, that I can never really make any progress with the thermal analysis !
My Snap to underlay is not working again.
See the misalignment between my orange rectangle, & the horizontal grey Underlay line,
(and the snap settings I had, I have tried all combinations) ...

So, I gave up with an underlay, and built some basic models with rectangles.
But they are also plagued with alignment issues.
The shapes snap together as I move them into place (again I have tried all the snap options & combinations I can think of)
But when I try to add Boundary Condition, I get so many red circles,
For example, when I add the left hand elements below,
They are 2 rectangles butted against 3 other rectangles (of identical width) ....

Here it is with the outer left element removed, its flat
I have tried so many different ways of putting this together
I don't know where to start in listing the methods
How should I be doing this?
I am using
THERM 7.8.80 (Downloaded from the website in Jan this year)
Windows 11 PRO 24H2
HP Elitedesk 800 G1 TWR
intel(R) Core(TM) i5-4590 / 3.3Ghz / 8 GB of RAM
I really hope I am being an idiot and missing some very obvious fundamental thing.
Thanks
Ben