The inventory slot for the block is blank, not the missing texture, just nothing there.  Works fine.  I set the default block state.  The only thing i can guess , is that i'm using a multipart blockstate in the .json, which has no default model.  It;s all setup when placing the block.  Even tried putting an "inventory" tag.

 

{
		"multipart": [
        {   "when": { "facing": "north" },
            "apply": { "model": "yabm:yb_M_stair_rail_side", "y": 90, "uvlock": false }
        },
        	{ "when": {"facing": "north" , "post1": true },
          	  "apply": { "model": "yabm:yb_M_stair_rail_post", "y": 90, "uvlock": true }
        	},
        	{ "when": {"facing": "north" , "post2": true },
              "apply": { "model": "yabm:yb_M_stair_rail_post", "y": -180, "uvlock": true }
       		},

        {   "when": { "facing": "south" },
            "apply": { "model": "yabm:yb_M_stair_rail_side", "y": -90, "uvlock": false }
        },
        	{ "when": {"facing": "south" , "post1": true },
          	"apply": { "model": "yabm:yb_M_stair_rail_post", "uvlock": true }
        	},
        	{ "when": {"facing": "south" , "post2": true },
            		"apply": { "model": "yabm:yb_M_stair_rail_post", "y": -90, "uvlock": true }
       		},
       		
       	{   "when": { "facing": "east" },
            "apply": { "model": "yabm:yb_M_stair_rail_side", "y": 180, "uvlock": false }
        },
        	{ "when": {"facing": "east" , "post1": true },
          	"apply": { "model": "yabm:yb_M_stair_rail_post", "y": 180, "uvlock": true }
        	},
        	{ "when": {"facing": "east" , "post2": true },
            		"apply": { "model": "yabm:yb_M_stair_rail_post", "y": -90, "uvlock": true }
       		},
       	{   "when": { "facing": "west" },
            "apply": { "model": "yabm:yb_M_stair_rail_side", "uvlock": false }
        },
        	{ "when": {"facing": "west" , "post1": true },
       	   "apply": { "model": "yabm:yb_M_stair_rail_post", "y": 90, "uvlock": true }
       		 },
        	{ "when": {"facing": "west" , "post2": true },
       	   "apply": { "model": "yabm:yb_M_stair_rail_post", "uvlock": true }
       		 }
    	],
    	"inventory": { "model": "yabm:yb_M_stair_rail_side", "uvlock": false }
}

 

 

I think you also need an item model. Look at the cobblestone wall blockstate/models.

I will , thanks

Worked perfectly . thanks again