mudler/LocalAI · error

Failed to write image to '%s'\n

Error message

Failed to write image to '%s'\n

What it means

Writing the generated image to the output path failed. Guard: ensure the output directory exists and is writable before generation; check the write result and return an error naming the path.

Source

Thrown at backend/go/stablediffusion-ggml/cpp/gosd.cpp:1046

            if (buffer) free(buffer);
        }
        return 1;
    }

    fprintf (stderr, "Writing PNG\n");

    fprintf (stderr, "DST: %s\n", dst);
    fprintf (stderr, "Width: %d\n", results[0].width);
    fprintf (stderr, "Height: %d\n", results[0].height);
    fprintf (stderr, "Channel: %d\n", results[0].channel);
    fprintf (stderr, "Data: %p\n", results[0].data);

    int ret = stbi_write_png(dst, results[0].width, results[0].height, results[0].channel,
                             results[0].data, 0);
    if (ret)
      fprintf (stderr, "Saved resulting image to '%s'\n", dst);
    else
      fprintf(stderr, "Failed to write image to '%s'\n", dst);

    // Clean up
    free(results[0].data);
    results[0].data = NULL;
    free(results);
    if (input_image_buffer) free(input_image_buffer);
    if (mask_image_buffer) free(mask_image_buffer);
    for (auto buffer : ref_image_buffers) {
        if (buffer) free(buffer);
    }
    fprintf (stderr, "gen_image is done: %s\n", dst);
    fflush(stderr);

    return !ret;
}

// ---------------- Video generation ----------------

View on GitHub (pinned to 44413a9d06)

Solutions

1. Verify the output directory exists and is writable by the backend process.
2. Check available disk space on the output volume.
3. Confirm the output path is valid for the platform.

When it happens

Trigger: Thrown at backend/go/stablediffusion-ggml/cpp/gosd.cpp:1046 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of mudler/LocalAI@44413a9d06 (2026-08-15). Data as JSON: /api/errors/889aaa7f078289aa. Report an issue: GitHub.