Fixing CUDA PTX Error When Running Qwen3-VL with vLLM on H200

Dec 7, 2025 · 4 min read · Running vision-language models like Qwen3-VL with vLLM on high-end GPUs should be straightforward. Except when it's not. The Problem I was setting up Qwen3-VL-8B-Instruct on our H200 cluster (8x H200, 143GB VRAM each) when I hit this error: vllm ser...