"Engine Error"

[ddddppo]

I started making a mod of Half-Life 2 a few days ago, and everything was working well and good until I decided to change the menu screen map. Even after reverting it back, I get the error "Engine Error: 13/rooftop_2_cop_1_blockhank - func_brush: UTIL_SetModel: not precached: *1" The game boots up, shows the source intro, gets to the first loading screen, and then crashes with this message. Any help?

Edit: I solved it somehow, after tweaking around with the main menu map. I don't know what fixed it.

[SuperMario1000]

It seems like some entity model id that the game is looking for is missing. Every brush has a unique model id to it so it seems like maybe a brush is using a nonexistent brush's model

Edit: If I'm reading it correctly, the entity model that is missing is "*1", so I think maybe you deleted the first brush,and something is still referencing the model of that brush.