err_msg:In settlement or delivery. Unable to get positions

            let position = _C(exchange.GetPosition)
            if (position !== null) {
            。。。。。
            ｝
            
            运行中断 提示：err_msg:In settlement or delivery. Unable to get positions
            我分析是 永续合约在结算时不能访问持仓所置，永续合约每天都会结算要怎么判断排除这种情况