keras-team/keras · error · ValueError

`kron` does not support tensors with dynamic rank for the Op

Error message

`kron` does not support tensors with dynamic rank for the OpenVINO backend.

What it means

Error "`kron` does not support tensors with dynamic rank for the OpenVINO backend." thrown in keras-team/keras.

Source

Thrown at keras/src/backend/openvino/numpy.py:2523

            inf = ov_opset.constant(inf_value, Type.f32).output(0)
        is_inf = ov_opset.equal(x, inf).output(0)
    return OpenVINOKerasTensor(is_inf)


def isreal(x):
    # Implement complex support when OpenVINO adds complex dtypes.
    x = convert_to_tensor(x)
    return ones(x.shape, dtype="bool")


def kron(x1, x2):
    x1 = get_ov_output(x1)
    x2 = get_ov_output(x2)
    x1, x2 = _align_operand_types(x1, x2, "kron()")
    x1_shape = x1.get_partial_shape()
    x2_shape = x2.get_partial_shape()
    if x1_shape.rank.is_dynamic or x2_shape.rank.is_dynamic:
        raise ValueError(
            "`kron` does not support tensors with dynamic rank for "
            "the OpenVINO backend."
        )
    ndim1 = x1_shape.rank.get_length()
    ndim2 = x2_shape.rank.get_length()
    if ndim1 < ndim2:
        axes = ov_opset.range(
            ov_opset.constant(0, Type.i32),
            ov_opset.constant(ndim2 - ndim1, Type.i32),
            ov_opset.constant(1, Type.i32),
        )
        x1 = ov_opset.unsqueeze(x1, axes)
        ndim1 = ndim2
    elif ndim2 < ndim1:
        axes = ov_opset.range(
            ov_opset.constant(0, Type.i32),
            ov_opset.constant(ndim1 - ndim2, Type.i32),
            ov_opset.constant(1, Type.i32),

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/openvino/numpy.py:2523 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/950c2e4ee26e0236. Report an issue: GitHub.