diff --git a/service/imService.go b/service/imService.go
index ed57284..3980548 100644
--- a/service/imService.go
+++ b/service/imService.go
@@ -137,7 +137,7 @@ func WSReceiveMessageServiceV2(modelParam proto.ModelParam, ctx *proto.IMParamCo
 	case proto.ModelTypeQianfan:
 		Qianfan(modelParam, ctx)
 	default:
-		resErr, resID = errors.New("model not exist"), 0
+		resErr, resID = errors.New("model type not exist:"+ctx.ModelType), 0
 	}
 	return resErr, resID
 }