Questions about the Heroes 4 map editor.

Create Random Map (random map generator)

I've never used this tool, but I suspect the problem might be with the "random map generator," as it doesn't come with the game initially, and until recently, I thought there wasn't one for Heroes 4 at all. Your first post was written in the Heroes 4 section. Perhaps you posted it in the wrong place, and you're actually talking about a different installment of Heroes. Judging by your screenshot, it's HOMM V.