Update app.py

app.py

@@ -2,21 +2,27 @@ import gradio as gr
 import trimesh
 import tempfile
 import os
-import shutil
 
 def convert(input_path_str):
     with tempfile.TemporaryDirectory() as tmpdir:
-        input_path = input_path_str  # already a path
+        input_path = input_path_str
         output_path = os.path.join(tmpdir, "output.glb")
 
         mesh = trimesh.load(input_path, force='mesh')
+
+        if mesh.is_empty:
+            raise ValueError("Invalid or empty OBJ mesh.")
+
         mesh.export(output_path, file_type='glb')
 
+        if not os.path.exists(output_path):
+            raise FileNotFoundError("Export failed: output.glb not created.")
+
         return output_path
 
 demo = gr.Interface(
     fn=convert,
-    inputs=gr.File(file_types=[".obj"], type="filepath"),  # type="filepath" is default
+    inputs=gr.File(file_types=[".obj"], type="filepath"),
     outputs=gr.File(file_types=[".glb"]),
     title="OBJ to glTF (.glb) Converter"
 )