keras-team/keras · error · ValueError

`patches` last dim ({static_flat}) is not divisible by prod(

Error message

`patches` last dim ({static_flat}) is not divisible by prod(size) ({pH * pW}).

What it means

Error "`patches` last dim ({static_flat}) is not divisible by prod(size) ({pH * pW})." thrown in keras-team/keras.

Source

Thrown at keras/src/ops/image.py:1270

        raise ValueError(
            "`patches` has unexpected rank for 2D reconstruction. "
            "Expected 3 (unbatched) or 4 (batched). "
            f"Received shape: {patches.shape}"
        )

    _unbatched = False
    if len(patches.shape) == 3:
        _unbatched = True
        patches = backend.numpy.expand_dims(patches, axis=0)

    shp = ops.shape(patches)
    B, gH, gW = shp[0], shp[1], shp[2]
    static_flat = patches.shape[-1]
    if static_flat is None:
        C = shp[3] // (pH * pW)
    else:
        if static_flat % (pH * pW) != 0:
            raise ValueError(
                f"`patches` last dim ({static_flat}) is not divisible by "
                f"prod(size) ({pH * pW})."
            )
        C = static_flat // (pH * pW)

    x = backend.numpy.reshape(patches, (B, gH, gW, pH, pW, C))
    x = backend.numpy.transpose(x, axes=(0, 1, 3, 2, 4, 5))
    x = backend.numpy.reshape(x, (B, gH * pH, gW * pW, C))

    if padding == "same":
        static_gH = patches.shape[1]
        static_gW = patches.shape[2]
        if isinstance(static_gH, int) and not (
            static_gH * pH - pH < H <= static_gH * pH
        ):
            raise ValueError(
                f"For `padding='same'`, `output_size` height ({H}) must "
                f"be in the range ((gH-1)*pH, gH*pH], i.e. "

View on GitHub (pinned to 7a34a03db6)

When it happens

Trigger: Thrown at keras/src/ops/image.py:1270 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/e621e1e775ce4da8. Report an issue: GitHub.