sgl-project/sglang · error · ValueError

unused video block token count entries

Error message

unused video block token count entries

What it means

Same trailing-consistency check as 2297 for videos: more video_block_token_counts groups were supplied than there are video references in condition_labels.

Source

Thrown at python/sglang/multimodal_gen/runtime/pipelines_core/stages/model_specific_stages/minimax_h3/presentation.py:300

            if not counts or not timestamps:
                raise ValueError(
                    "video reference requires block token counts and timestamps"
                )
            presentation.text(_text_ids(tokenizer, f"<Video {ordinal}>: "))
            _timestamped_video_blocks(
                presentation,
                tokenizer,
                counts=counts,
                timestamps=timestamps,
                context="",
                video_token_id=video_token_id,
            )
        else:
            raise ValueError(f"unsupported ref2va condition type {cond_type!r}")
    if image_seen != len(image_token_counts):
        raise ValueError("unused image_token_count entries")
    if video_seen != len(video_counts_by_ref):
        raise ValueError("unused video block token count entries")
    presentation.text(_text_ids(tokenizer, prompt))
    return presentation.build(return_video_mask=return_video_mask)


__all__ = [
    "minimax_h3_multi_image_presentation",
    "minimax_h3_ref2va_presentation",
    "minimax_h3_ref2va_video_presentation",
    "minimax_h3_text_only_ids",
]

View on GitHub (pinned to 0132848349)

Solutions

1. Remove unused counts (and their timestamps) groups
2. Add the missing video reference to condition_labels
3. Derive both from the same conditioning record

Example fix

// before
video_block_token_counts=[[196],[196]], one video ref in plan
// after
video_block_token_counts=[[196]], one video ref in plan

n_videos = sum(1 for t, _ in condition_labels if t == "video")
assert len(video_counts_by_ref) == n_videos

When it happens

Trigger: video_block_token_counts=[[196],[196]] but condition_labels contains only one ("video", N) entry.

Common situations: Removing a video from the plan without removing its counts group; building counts for all segments while the plan references a subset.

Related errors

• video block token counts and timestamps must align
• image_token_count required for an image reference
• video reference requires block token counts and timestamps
• unused image_token_count entries
• seq_len {seq_len} < used rows {used}

AI-assisted analysis of sgl-project/sglang@0132848349 (2026-08-28). Data as JSON: /api/errors/ae585b46826f5c2e. Report an issue: GitHub.