MiniMax H3 Load Latent Checkpoint (TJ)

If Save Latent Checkpoint is the pen that writes a clip's latent to disk, MiniMax H3 Load Latent Checkpoint (TJ) is the hand that picks it back up. Because H3 can't carry tensors between separate queue submissions, a multi-clip shoot has to round-trip the previous clip's latent through a file, and this node is the read half: it loads a <name>.h3lat.safetensors from output/one_minimax_h3/_latent_checkpoints/ and hands you back a proper H3 AV latent to feed into continuation logic.

The inputs are where the useful intelligence lives:

• checkpoint_name - must exactly match the name the Save node used (clip001, prev_clip, whatever). Mismatched names mean "file not found," loudly.
• strict - ON (default): a missing checkpoint is an error. OFF: missing means latent=None and you carry on.
• index - connect the MiniMax H3 Prompt Queue's index output here, and strict becomes irrelevant: on index ≤ 1 (the first clip of a sequence) a missing file is fine and silently skipped; from clip 2 onward a missing file is a real error no matter what strict says.

That index behavior is the part people underestimate. It exists because leftover checkpoint files from a previous, different-resolution session are junk - if you're starting a fresh sequence at clip 1, you don't want a stale file poisoning the first clip. So clip 1 never reads the file at all, by design. This is also why "stop the shoot, come back tomorrow, resume" just works: clip 2 onward read the checkpoint from disk, and as long as it's there, the sequence picks up where it left off.

Output is a single latent (the two-stream NestedTensor, cloned off the file's memory map so nothing holds the file open). It's meant to feed prev_latent on the Sequencer or Latent Continuation node.

Like its Save sibling, this is mostly an internal cog: the One-Take Sampler loads and saves checkpoints itself, so casual users won't wire this pair manually. It exists for the people hand-building a custom H3 sampler chain - and if that's you, the index wiring from the Prompt Queue is what makes the first-clip grace work without touching the strict toggle.

Install

Ships in ComfyUI-TJ_NODE:

cd ComfyUI/custom_nodes
git clone https://github.com/designloves2/ComfyUI-TJ_NODE

or via Manager, then restart. No extra deps beyond ComfyUI's H3 support and your own H3 model files (weights, video VAE, audio VAE) - and the license reminder applies as always: the H3 local-weights path excludes the US, EU, UK and South Korea.

Troubleshooting

• "체크포인트를 찾을 수 없습니다" on clip 2+ - a genuinely missing file. The Save node didn't run, or the name differs between Save and Load. Check _latent_checkpoints/ for what's actually there.
• It errors on clip 1 - you're on an old version that predates the index auto-grace, or you haven't wired index. Wire the Prompt Queue's index and it stops demanding a file on the first clip.
• Resolution mismatch later in the chain - you loaded a checkpoint from a different resolution session. Delete it and restart the sequence; the Sequencer will tell you if the shapes don't line up.