# Fine-tune a model on translation:
**URL:**
**Author:**  [@MaryaAI](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FMaryaAI)%5C
**Post date:** [July 17, 2021, 6:33am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F1 "2021-07-17T06:33:32Z")
when passing all along with datasets to the **Seq2SeqTrainercall** I got :
HTTPError: 400 Client Error: Bad Request for url: [https://huggingface.co/api/repos/create](https://huggingface.co/api/repos/create) - Only regular characters and ‘-’, ‘\_’, ‘.’ accepted
---
**Author:**  [@sgugger](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fsgugger)%5C
**Post date:** [July 17, 2021, 8:07am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F2 "2021-07-17T08:07:32Z")
You should post relevant code when asking for help, otherwise no one can really understand what’s going on. In this instance, the problem is very likely when your define your `Seq2SeqTrainingArguments`, so please share how you defined those, or if you used your code as a script, what arguments you passed to it,
---
**Author:**  [@MaryaAI](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FMaryaAI)%5C
**Post date:** [July 17, 2021, 9:17am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F4 "2021-07-17T09:17:58Z")
Hi sgugger, Thanks for the advice, I just tried the same code from [How to fine-tune a model on translation](https://github.com/huggingface/notebooks/blob/master/examples/translation.ipynb)
```auto
model = AutoModelForSeq2SeqLM.from_pretrained(model_checkpoint)
batch_size = 16
args = Seq2SeqTrainingArguments(
"test-translation",
evaluation_strategy = "epoch",
learning_rate=2e-5,
per_device_train_batch_size=batch_size,
per_device_eval_batch_size=batch_size,
weight_decay=0.01,
save_total_limit=3,
num_train_epochs=1,
predict_with_generate=True,
fp16=True,
push_to_hub=True,
push_to_hub_model_id=f"{model_checkpoint}-finetuned-{source_lang}-to-{target_lang}",
)
data_collator = DataCollatorForSeq2Seq(tokenizer, model=model)
trainer = Seq2SeqTrainer(
model,
args,
train_dataset=tokenized_datasets["train"],
eval_dataset=tokenized_datasets["validation"],
data_collator=data_collator,
tokenizer=tokenizer,
compute_metrics=compute_metrics
)
```
---
**Author:**  [@sgugger](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fsgugger)%5C
**Post date:** [July 17, 2021, 2:09pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F5 "2021-07-17T14:09:04Z")
Once interpreted, what is the value of `f"{model_checkpoint}-finetuned-{source_lang}-to-{target_lang}"`? Apparently since there is some special character in it according to the error message.
---
**Author:**  [@MaryaAI](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FMaryaAI)%5C
**Post date:** [July 17, 2021, 3:19pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F6 "2021-07-17T15:19:07Z")
The value is:
Helsinki-NLP/opus-mt-en-ro-finetuned-en-to-ro
---
**Author:**  [@sgugger](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2Fsgugger)%5C
**Post date:** [July 17, 2021, 3:25pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F7 "2021-07-17T15:25:29Z")
Ah yes, the / is not going to work. You should remove it or replace it by a /. Will adapt the notebooks next week!
---
**Author:**  [@MaryaAI](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FMaryaAI)%5C
**Post date:** [July 17, 2021, 3:29pm UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Ffine-tune-a-model-on-translation%2F8443%2F8 "2021-07-17T15:29:05Z")
Thanks a lot 💐 💐 💐