I found that when creating Java items, the adjusting header part is displayed, and I noticed that the skin's pixel grid is not a standard square but a rectangle, which causes the model I adjusted to ...

The Internal Exception Java.IO.IOException error usually occurs when you launch Minecraft, or when the game is underway. This error can be caused by a number of different things.

Mi primer modsito de minecraft. Full Java, y Blockbench. Para la proxima versión le cambio los derechos de autor a MIT. - davidsisa/OneNetherDungeon ...