Nullspace (NSC) and Called fusion.

[Skippman]

Is there any rule that would prevent you from using the Called fusion to summon a weapon from a Nullspace Chamber as a swift action?

[Jimbles the Mediocre]

Called weapons don't function anywhere that teleportation abilities are blocked, and null-space chambers can only be opened or closed from the outside. I would rule that a closed null-space chamber would prevent the teleportation of a called weapon, but that's just my opinion.

[whew]

It's not in range when it's on another dimension.

It can't detect the call when it's on another dimension.

[whew]

None of the teleportation spells say that they work across planes, although a few (the ones with the longest range!) say that they don't. Argh!

Edit: except Plane Shift