cannot find tokenizer merges in model file

[flatsiedatsie]

Noticed this error loading the Llama 1B and 3B models.

I'm updating Wllama now, hopefully that fixes it.

[felladrin]

I agree it may be due to the outdated version using an older version of llama.cpp, because Llama 1B is available to try on https://github.ngxson.com/wllama/examples/main/dist/ and it's working fine there. I've also tried the 3B model, and it's all good.
Let us know if the update solved the issue!

[flatsiedatsie]

Odd, it didn't solve it.

I tried re-downloading the model itself, but that didn 't help.

Then I tried Firefox for comparison, and actually noticed the same error.

I'm attempting a non-chunked version of the model next.

https://huggingface.co/BoscoTheDog/llama_3_2_it_1b_q4_k_m_chunked
->
https://huggingface.co/hugging-quants/Llama-3.2-1B-Instruct-Q4_K_M-GGUF/resolve/main/llama-3.2-1b-instruct-q4_k_m.gguf

[flatsiedatsie]

bingo

[flatsiedatsie]

I re-chunked the 1B using the very latest version of llama.cpp.

Now it loads, but only outputs a single word before giving this error:

// Looking back, this error may have just been my code trying to unload Wllama after inference was complete, and failing.

[felladrin]

Could you try these splits and confirm if they work? (Those are the ones I'm using without issues on Wllama v1.16.2)

• Llama 3.2 1B: https://huggingface.co/Felladrin/gguf-sharded-Q5_K_L-Llama-3.2-1B-Instruct/resolve/main/model.shard-00001-of-00005.gguf
• Llama3.2 3B: https://huggingface.co/Felladrin/gguf-sharded-Q5_K_L-Llama-3.2-3B-Instruct/resolve/main/model.shard-00001-of-00007.gguf

We need first to find out if the problem is with:

1. The split files
2. The wllama lib
3. Your code around wllama (maybe a config or sampling config can be causing the problem, so you can first try setting the sampling as { temp: 0 })

[flatsiedatsie]

Here is the chunked model that only outputs one word by the way: https://huggingface.co/BoscoTheDog/llama_3_2_it_1b_q4_k_m_chunked/resolve/main/llama-3_2_it_1b_q4_0-00001-of-00004.gguf

[flatsiedatsie]

Strange. Now I don't get any output.

I don't think I see it doing that looping action normally. Could it be loading each chunk as if it were the total model?

[flatsiedatsie]

Setting the sampling to minimal worked!

I thought that allow_offline might be the issue. But after re-enabling it last, everything still works 0_0.

I keep 'allow_offline' enabled all the time. Is that a bad idea?

[felladrin]

I thought that allow_offline might be the issue. But after re-enabling it last, everything still works 0_0.

I keep 'allow_offline' enabled all the time. Is that a bad idea?

Not at all! I leave it always enabled too! :D

Setting the sampling to minimal worked!

Interesting! Did it work with https://huggingface.co/BoscoTheDog/llama_3_2_it_1b_q4_k_m_chunked/resolve/main/llama-3_2_it_1b_q4_0-00001-of-00004.gguf ?

If so, we can conclude it is something specific with the config passed to Wllama? (If that’s the case, have you found the specific config combination that caused the issue?)

[flatsiedatsie]

I used to have this enabled all the time too, but I've removed it now.

//model_settings['n_seq_max'] = 1;
//model_settings['n_batch'] = 1024; //2048

But re-enabling it as a test had no (negative) effect.

I still have this enabled:

model_settings['embeddings'] = false;

Should I remove that?

[flatsiedatsie]

I got the vague notion that .gguf files have template information within them?

Currently I use Transformers.js to turn a conversation dictionary into a templated string, and then feed that into the AI model.

Is there a way that I can skip that step and feed a dictionary of a conversation into Wllama?

[
    {
        "role": "user",
        "content": "How many R's are there in the word strawberry?"
    },
    {
        "role": "assistant",
        "content": "There are 2 R's in the word \"strawberry\"."
    }
]

Aha! There is a function to get the Jinja template from the GGUF, and then Wllama's uses a dependency on @huggingface/jinja to apply that template.

[flatsiedatsie]

[felladrin]

Does this error also happen when configuring Wllama with n_threads: 1? (forcing it to single-thread)

[felladrin]

I got the vague notion that .gguf files have template information within them?

Currently I use Transformers.js to turn a conversation dictionary into a templated string, and then feed that into the AI model.

Is there a way that I can skip that step and feed a dictionary of a conversation into Wllama?

[
    {
        "role": "user",
        "content": "How many R's are there in the word strawberry?"
    },
    {
        "role": "assistant",
        "content": "There are 2 R's in the word \"strawberry\"."
    }
]

There is, by using the @huggingface/jinja package (the same as Transformers.js uses).

Here's the same logic used in https://github.ngxson.com/wllama/examples/main/dist/:

import { Template } from "@huggingface/jinja";

const wllama = new Wllama(/*...*/);
 
await wllama.loadModelFromUrl(/*...*/);

export const formatChat = async (wllama: Wllama, messages: Message[]) => {
  const defaultChatTemplate =
    "{% for message in messages %}{{'<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>' + '\n'}}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant\n' }}{% endif %}";

  const template = new Template(
    wllama.getChatTemplate() ?? defaultChatTemplate,
  );

  return template.render({
    messages,
    bos_token: await wllama.detokenize([wllama.getBOS()]),
    eos_token: await wllama.detokenize([wllama.getEOS()]),
    add_generation_prompt: true,
  });
};

const messages = [
    {
        "role": "user",
        "content": "Hi!"
    },
    {
        "role": "assistant",
        "content": "Hello! How may I help you today?"
    }
    {
        "role": "user",
        "content": "How many R's are there in the word strawberry?"
    },
]

const prompt = formatChat(wllama, messages);
// <|im_start|>user
// Hi!<|im_end|>
// <|im_start|>assistant
// Hello! How may I help you today?<|im_end|>
// <|im_start|>user
// How many R's are there in the word strawberry?<|im_end|>
// <|im_start|>assistant

[flatsiedatsie]

Oh wow, diving into your info I realized there is even an abstraction layer above Transformers.js.

// Wait, no, it's just to use the API.

[flatsiedatsie]

I've implemented your templating approach, thank you! Much simpler than creating an entire Transformers.js instance.

[danielhanchen]

This might be related to unslothai/unsloth#1065, unslothai/unsloth#1062 - temporary fixes are provided for Unsloth finetuners, and can confirm with the Hugging Face team at ggml-org/llama.cpp#9692 it's tokenizers causing issues

[ngxson]

This problem is reported on the upstream repo: ggml-org/llama.cpp#9692