keras-team/keras · error · ValueError

`slice` is not supported by OpenVINO backend for `start_indi

Error message

`slice` is not supported by OpenVINO backend for `start_indices` or `shape` with non-integer types

What it means

Error "`slice` is not supported by OpenVINO backend for `start_indices` or `shape` with non-integer types" thrown in keras-team/keras.

Source

Thrown at keras/src/backend/openvino/core.py:1380

    if not isinstance(start_indices, tuple):
        raise ValueError(
            "`slice` operation requires tuple for `start_indices with the "
            f"openvino backend. Received: start_indices={start_indices}"
        )
    if not isinstance(shape, tuple):
        raise ValueError(
            "`slice` operation requires tuple for `shape` with the "
            f"openvino backend. Received: shape={shape}"
        )

    axes = []
    start = []
    stop = []

    def prepare_slice_index(val):
        val_type = val.get_element_type()
        if not val_type.is_integral():
            raise ValueError(
                "`slice` is not supported by OpenVINO backend "
                "for `start_indices` or `shape` with non-integer types"
            )
        if val_type != Type.i32:
            val = ov_opset.convert(val, Type.i32).output(0)
        if len(val.get_partial_shape()) == 0:
            val = ov_opset.unsqueeze(
                val, ov_opset.constant(0, Type.i32)
            ).output(0)
        return val

    for idx, length in enumerate(shape):
        if length is not None and (
            isinstance(length, OpenVINOKerasTensor) or length >= 0
        ):
            axes.append(idx)
            start_val = prepare_slice_index(get_ov_output(start_indices[idx]))
            stop_val = prepare_slice_index(

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/openvino/core.py:1380 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/11627cfc8c2a9168. Report an issue: GitHub.