diff --git a/main.py b/main.py
index e57c146..02b8f7a 100644
--- a/main.py
+++ b/main.py
@@ -151,7 +151,7 @@ async def fastapi_dump_inp(network: str, inp: str) -> bool:
 # 必须用这个PlainTextResponse，不然每个key都有引号
 @app.get("/runproject/", response_class = PlainTextResponse)
 def fastapi_run_project(network: str) -> str:
-
+    global lock_simulation
     if lock_simulation:
         raise HTTPException(status_code=409, detail="is in simulation")