{"record":{"id":"828d250ecaa8f68b","repo":"tensorflow/models","slug":"the-block-spec-cannot-be-empty-for","errorCode":null,"errorMessage":"The block spec cannot be empty for {} !","messagePattern":"The block spec cannot be empty for (.+?) !","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"official/vision/modeling/backbones/mobiledet.py","lineNumber":323,"sourceCode":"  Args:\n    specs: A `dict` specification of block specs of a mobiledet version.\n    filter_size_scale: A `float` multiplier for the filter size for all\n      convolution ops. The value must be greater than zero. Typical usage will\n      be to set this value in (0, 1) to reduce the number of parameters or\n      computation cost of the model.\n    divisible_by: An `int` that ensures all inner dimensions are divisible by\n      this number.\n\n  Returns:\n    A list of `BlockSpec` that defines structure of the base network.\n  \"\"\"\n\n  spec_name = specs['spec_name']\n  block_spec_schema = specs['block_spec_schema']\n  block_specs = specs['block_specs']\n\n  if not block_specs:\n    raise ValueError(\n        'The block spec cannot be empty for {} !'.format(spec_name))\n\n  if len(block_specs[0]) != len(block_spec_schema):\n    raise ValueError('The block spec values {} do not match with '\n                     'the schema {}'.format(block_specs[0], block_spec_schema))\n\n  decoded_specs = []\n\n  for s in block_specs:\n    kw_s = dict(zip(block_spec_schema, s))\n    decoded_specs.append(BlockSpec(**kw_s))\n\n  for ds in decoded_specs:\n    if ds.filters:\n      ds.filters = nn_layers.round_filters(filters=ds.filters,\n                                           multiplier=filter_size_scale,\n                                           divisor=divisible_by,\n                                           round_down_protect=False,","sourceCodeStart":305,"sourceCodeEnd":341,"githubUrl":"https://github.com/tensorflow/models/blob/e006f5f0d534913e49c1f1dae87364039fa607e2/official/vision/modeling/backbones/mobiledet.py#L305-L341","documentation":"Error \"The block spec cannot be empty for {} !\" thrown in tensorflow/models.","triggerScenarios":"Thrown at official/vision/modeling/backbones/mobiledet.py:323 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Provide a non-empty block spec for the named block group in the MobileDet backbone config.","Use a built-in architecture name (e.g. 'mobiledet_edgetpu') instead of a custom empty spec."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"e006f5f0d534913e49c1f1dae87364039fa607e2","analyzedAt":"2026-08-24T14:09:15.576Z","schemaVersion":2},"datasetVersion":"2026-08-24T17:17:21.512Z"}