Update backend/main.py

backend/main.py

@@ -408,8 +408,14 @@ async def analyze(files: List[UploadFile] = File(...)):
 
         # Extract each paper
         for path, name in zip(tmp_paths, paper_names):
+        try:
             result = extract_protocol(client, path, name)
             extracted.append(result)
+        except Exception as e:
+            raise HTTPException(
+                status_code=500,
+                detail=f"Failed to process {name}: {str(e)}"
+            )
 
         # Compare
         comparison = compare_protocols(client, extracted, paper_names)