convert: add error message for mistral3 quantized weight (#17686)

diff --git a/convert_hf_to_gguf.py b/convert_hf_to_gguf.py
index a54cce887bb747de41c7cf18ccaf7e4ff00f877d..8ddb6d04cd992a473acfba4700918b715ac0f5e2 100755 (executable)
--- a/convert_hf_to_gguf.py
+++ b/convert_hf_to_gguf.py
@@ -2842,6 +2842,10 @@ class Mistral3Model(LlamaModel):
             self.gguf_writer.add_attn_temperature_scale(rope_params["llama_4_scaling_beta"])
 
     def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None):
+        # TODO: probably not worth supporting quantized weight, as official BF16 is also available
+        if name.endswith("weight_scale_inv"):
+            raise ValueError("This is a quantized weight, please use BF16 weight instead")
+
         name = name.replace("language_model.", "")
         if "multi_modal_projector" in name or "vision_tower" in name:
             return []