Error when starting MiniCPM4 using sglang

[allen0927]

I'm running on H20 and sglang is installed through these command:
`git clone -b openbmb https://github.com/OpenBMB/sglang.git
cd sglang

pip install --upgrade pip
pip install -e "python[all]"`

when I execute this command I encountered the below error

python -m sglang.launch_server --model-path OpenBMB/MiniCPM4-8B/ --trust-remote-code --port 30000 --chat-template chatml

File "sglang/python/sglang/srt/models/minicpm.py", line 145, in init self.rotary_emb.cos_sin_cache = self.rotary_emb._compute_cos_sin_cache() TypeError: Phi3LongRoPEScaledRotaryEmbedding._compute_cos_sin_cache() missing 3 required positional arguments: 'max_position_embeddings', 'rescale_factors', and 'mscale'

Did anyone deal with this error before?

[saurabh12453]

Myself tooo

…

On Mon, 14 Jul 2025 at 9:20 AM, allen0927 ***@***.***> wrote: *allen0927* created an issue (OpenBMB/MiniCPM#310) <#310> I'm running on H20 and sglang is installed through these command: `git clone -b openbmb https://github.com/OpenBMB/sglang.git cd sglang pip install --upgrade pip pip install -e "python[all]"` when I execute this command I encountered the below error python -m sglang.launch_server --model-path OpenBMB/MiniCPM4-8B/ --trust-remote-code --port 30000 --chat-template chatml File "sglang/python/sglang/srt/models/minicpm.py", line 145, in *init* self.rotary_emb.cos_sin_cache = self.rotary_emb._compute_cos_sin_cache() TypeError: Phi3LongRoPEScaledRotaryEmbedding._compute_cos_sin_cache() missing 3 required positional arguments: 'max_position_embeddings', 'rescale_factors', and 'mscale' Did anyone deal with this error before? — Reply to this email directly, view it on GitHub <#310>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BLHMSJKQVZECB4VPV5S7QC33IMSG5AVCNFSM6AAAAACBN4ANO6VHI2DSMVQWIX3LMV43ASLTON2WKOZTGIZDOMRWGU4DKOA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[suhmily10]

We just fixed it by changing default branch to https://github.com/OpenBMB/sglang/tree/openbmb, please try with this new branch and feel free to connect if there are still any problems.

[allen0927]

I also posted same issue under sglang's repository, they have made updates to fix this error, please check this pull request: sgl-project/sglang#8022

[xcjthu]

Thanks a lot for your feedback! We can use the updated version of sglang for the inference of MiniCPM4.