keras-team/keras · error · ValueError

The number of input channels must be evenly divisible by ker

Error message

The number of input channels must be evenly divisible by kernel's in_channels. Received input channels {channels} and kernel in_channels {kernel_in_channels}. 

What it means

Error "The number of input channels must be evenly divisible by kernel's in_channels. Received input channels {channels} and kernel in_channels {kernel_in_channels}. " thrown in keras-team/keras.

Source

Thrown at keras/src/backend/numpy/nn.py:658

    strides = _convert_to_spatial_operand(
        strides,
        num_spatial_dims,
        data_format,
        include_batch_and_channels=False,
    )
    dilation_rate = _convert_to_spatial_operand(
        dilation_rate,
        num_spatial_dims,
        data_format,
        include_batch_and_channels=False,
    )
    if data_format == "channels_last":
        channels = inputs.shape[-1]
    else:
        channels = inputs.shape[1]
    kernel_in_channels = kernel.shape[-2]
    if channels % kernel_in_channels > 0:
        raise ValueError(
            "The number of input channels must be evenly divisible by "
            f"kernel's in_channels. Received input channels {channels} and "
            f"kernel in_channels {kernel_in_channels}. "
        )
    feature_group_count = channels // kernel_in_channels
    result = np.array(
        jax.lax.conv_general_dilated(
            inputs,
            kernel if is_tensor(kernel) else kernel.numpy(),
            strides,
            padding,
            rhs_dilation=dilation_rate,
            dimension_numbers=dimension_numbers,
            feature_group_count=feature_group_count,
        )
    )
    if result.size == 0 and inputs.size != 0:
        raise ValueError(

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/backend/numpy/nn.py:658 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/8c8f9ee59754113d. Report an issue: GitHub.