keras-team/keras · error · ValueError

Invalid input shape for input {x} with name '{self._inputs[i

Error message

Invalid input shape for input {x} with name '{self._inputs[i].name}' and path '{path}'. Expected shape {ref_shape}, but input has incompatible shape {x.shape}

What it means

Error "Invalid input shape for input {x} with name '{self._inputs[i].name}' and path '{path}'. Expected shape {ref_shape}, but input has incompatible shape {x.shape}" thrown in keras-team/keras.

Source

Thrown at keras/src/models/functional.py:316

            if x is None:
                adjusted.append(x)
                continue
            x_rank = len(x.shape)
            ref_rank = len(ref_shape)
            if x_rank == ref_rank:
                adjusted.append(x)
                continue
            if x_rank == ref_rank + 1:
                if x.shape[-1] == 1:
                    adjusted.append(ops.squeeze(x, axis=-1))
                    continue
            if x_rank == ref_rank - 1:
                if ref_shape[-1] == 1:
                    adjusted.append(ops.expand_dims(x, axis=-1))
                    continue
            flat_paths_and_inputs = tree.flatten_with_path(self._inputs_struct)
            path = ".".join(str(p) for p in flat_paths_and_inputs[i][0])
            raise ValueError(
                f"Invalid input shape for input {x} with name "
                f"'{self._inputs[i].name}' and path '{path}'. Expected shape "
                f"{ref_shape}, but input has incompatible shape {x.shape}"
            )
        # Add back metadata.
        for i in range(len(flat_inputs)):
            if hasattr(flat_inputs[i], "_keras_history"):
                adjusted[i]._keras_history = flat_inputs[i]._keras_history
            mask = backend.get_keras_mask(flat_inputs[i])
            if mask is not None:
                backend.set_keras_mask(adjusted[i], mask)
        return adjusted

    def _standardize_inputs(self, inputs):
        raise_exception = False
        if (
            isinstance(self._inputs_struct, list)
            and len(self._inputs_struct) == 1

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/models/functional.py:316 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of keras-team/keras@7a34a03db6 (2026-08-25). Data as JSON: /api/errors/01a07d1684a28c32. Report an issue: GitHub.