Update app_gradio.py

app_gradio.py

@@ -314,9 +314,9 @@ def run_rag_qa(query, papers_df, question_type):
         doc = Document(page_content=content, metadata=metadata)
         documents.append(doc)
 
+    chromadb.api.client.SharedSystemClient.clear_system_cache()
     try:
         del vectorstore, splits
-        chromadb.api.client.SharedSystemClient.clear_system_cache()
     except:
         print('no vectorstore found, initializing')
     text_splitter = RecursiveCharacterTextSplitter(chunk_size=150, chunk_overlap=50, add_start_index=True)