HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

So, that’s where the problem lies! Thanks! So, the version I created only works for a clean SoD (Shadow of Death) installation. And here’s another related question: where in the rmg file are the limits for the parameters set during gameplay – Minimum Size, Maximum Size, human start, computer start (i.e., the possible map sizes and number of players)? The template designations (like 2SM4d, 6LM10a, 8MM6a, 8XM12, and especially types like Balance, etc.) don’t seem to correlate with these parameters. Or can this only be seen in files like 2SM4d.jpg?