add some debug prints to check dir exists

main.py

@@ -51,17 +51,27 @@ async def upload_zip(file: UploadFile = File(...)):
         ]
 
         try:
-            subprocess.run(command, check=True)
+            result = subprocess.run(command, check=True, capture_output=True, text=True)
+            print("Subprocess output:", result.stdout)
+            print("Subprocess error:", result.stderr)
         except subprocess.CalledProcessError as e:
+            print("Subprocess failed with error:", e.stderr)
             raise HTTPException(status_code=500, detail=f"3D model generation failed: {str(e)}")
 
+        # Debug: List files in the output directory
+        print("Files in output directory:", os.listdir(output_dir))
+
         # Find the .glb file in the output directory
         glb_files = [os.path.join(output_dir, f) for f in os.listdir(output_dir) if f.endswith('.glb')]
         if not glb_files:
-            raise HTTPException(status_code=500, detail="No .glb file generated")
+            raise HTTPException(status_code=500, detail=f"No .glb file generated in {output_dir}")
 
         glb_file_path = glb_files[0]
 
+        # Debug: Check if the file exists
+        if not os.path.exists(glb_file_path):
+            raise HTTPException(status_code=500, detail=f"File {glb_file_path} does not exist")
+
         # Return the .glb file as a response
         return FileResponse(glb_file_path, media_type='application/octet-stream', filename=os.path.basename(glb_file_path))