{"record":{"id":"27f9a3bce10abb54","repo":"rohitg00/ai-engineering-from-scratch","slug":"hidden-self-hidden-not-divisible-by-heads-self","errorCode":null,"errorMessage":"hidden {self.hidden} not divisible by heads {self.heads}","messagePattern":"hidden (.+?) not divisible by heads (.+?)","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"phases/19-capstone-projects/59-vit-transformer/code/main.py","lineNumber":62,"sourceCode":"VisionFrontEnd = _front_module.VisionFrontEnd\nsynthesize_image = _front_module.synthesize_image\n\n\n@dataclass(frozen=True)\nclass ViTConfig:\n    image_size: int = 224\n    patch_size: int = 16\n    in_channels: int = 3\n    hidden: int = 768\n    depth: int = 12\n    heads: int = 12\n    mlp_ratio: float = 4.0\n    dropout: float = 0.0\n\n    @property\n    def head_dim(self) -> int:\n        if self.hidden % self.heads != 0:\n            raise ValueError(f\"hidden {self.hidden} not divisible by heads {self.heads}\")\n        return self.hidden // self.heads\n\n    def front_end_config(self) -> FrontEndConfig:\n        return FrontEndConfig(\n            image_size=self.image_size,\n            patch_size=self.patch_size,\n            in_channels=self.in_channels,\n            hidden=self.hidden,\n        )\n\n\nclass MultiHeadSelfAttention(nn.Module):\n    def __init__(self, cfg: ViTConfig) -> None:\n        super().__init__()\n        self.cfg = cfg\n        self.qkv = nn.Linear(cfg.hidden, cfg.hidden * 3, bias=True)\n        self.out = nn.Linear(cfg.hidden, cfg.hidden, bias=True)\n        self.drop = nn.Dropout(cfg.dropout)","sourceCodeStart":44,"sourceCodeEnd":80,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/phases/19-capstone-projects/59-vit-transformer/code/main.py#L44-L80","documentation":"Error \"hidden {self.hidden} not divisible by heads {self.heads}\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at phases/19-capstone-projects/59-vit-transformer/code/main.py:62 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"39ea8a1c6d0b61f071226eff7ede4d4105fed820","analyzedAt":"2026-08-26T03:13:46.626Z","schemaVersion":2},"datasetVersion":"2026-08-26T07:17:17.940Z"}