The best thing to do when you encounter the NPE is work out why and if you should or not correct in place.


Error: Acronym overflow has occured near "NPE".


NPE = Null Pointer Exception.

In Java (and other Java Virtual Machine languages like Groovy, Scala, and Kotlin), there is a ...

1. Create a named blueprint or blueprint book.
2. Add the blueprint/book to my blueprints.
3. Add a new unnamed blueprint book to my blueprints (Click on "New Blueprint book", drop in my blueprints).

The following combinations (base item + alt image) are hard to see what the alt item is:
1. assembling machine 1 + small power pole
2. wooden chest + yellow inserter (esp. the top arm)
3. wooden chest + small power pole

I'm not sure about other combinations.

1. Set the UI scaling to 75% (default), start a new map, and view the preview.
2. Set the UI scaling to 100%, start a new map, and view the preview.

In 1, the Play button is fully visible and there is a gap between it and the "Close preview" button.

In 2, the Play button is clipped so the "Play ...

Steps to reproduce:
1. Place a stone furnace down on the map next to a burner miner mining iron.
2. Press Alt.
3. Add coal to the miner and furnace.
4. Click on the furnace to see it progress smeling the iron ore.
5. Wait for the burner miner to run out of fuel, but the furnace to still have fuel ...

This affects Cliffs and Enemy Bases. The Frequency sliders for those are limited to 17%. To disable them, you need to set Continuity (for Cliffs), or Size (for Bases) to None. I initially tried setting the Frequency to 0/None, which made more sense to me.