**Root Cause:**
Out of Memory (OOM). The requested context window (262,144 tokens) requires significantly more VRAM for the KV cache than the 1,024 MiB currently available on the GPU.

**Next Two Actions:**
1. **Reduce Context Size:** Lower the `-c` (or `--ctx-size`) parameter to a value compatible with your hardware (e.g., 4096 or 8192).
2. **Optimize VRAM Usage:** Reduce the number of GPU layers (`-ngl`) to free up memory, or enable KV cache quantization (e.g., using `-ctk q8_0` and `-ctv q8_0`) to reduce the memory footprint per token.