Random Upsize Errors out of nowhere.

This has happened in a couple projects now - I notice when it happens because my changes inside graphs stop having any effects.

I see things like this in the console: Thread failed: System.Exception: Couldn't upsize: src Den.Tools.CoordRect: offsetX:-2564 offsetZ:-2565 sizeX:5128 sizeZ:5128 is less than dst Den.Tools.CoordRect: offsetX:1010 offsetZ:-2068 sizeX:545 sizeZ:545

With Twobob's guidance we were able to trace it down to a srcMatrix.size.x (and y) value of Infinity - while the value of rect.size.x (and y) = 1. Looking at the imported map objects, the actual PNGs I had set in them were missing. Readding these fixed the issue.

1. This error should be more specific - perhaps using a check for that 1x1 size or even just the infinity value to throw exception stating the map is not configured.
2. Not sure why the imported maps become non-configured but it's concerning.