Update save.py

unsloth/save.py

@@ -591,6 +591,19 @@ def save_to_gguf(
             for line in sp.stderr:
                 print(line.decode("utf-8"), flush = True, end = "")
         pass
+
+        # Check if quantization succeeded!
+        if not os.path.isfile(final_location):
+            raise RuntimeError(
+                "Unsloth: Quantization failed! You might have to compile llama.cpp yourself, then run this again.\n"\
+                "You do not need to close this Python program. Run the following commands in a new terminal:\n"\
+                "You must run this in the same folder as you're saving your model.\n"\
+                "git clone https://github.com/ggerganov/llama.cpp\n"\
+                "cd llama.cpp && make clean && LLAMA_CUBLAS=1 make -j\n"\,
+                "Once that's done, redo the quantization."
+            )
+        pass
+        
         print(f"Unsloth: Conversion completed! Output location: {final_location}")
     pass