我最近去客人的CNR下指令：
/opt/nwreg2/local/usrbin/iphist -N someAcc -P somePwd
-l -f address,client-mac-addr,binding-start-time,binding-end-time all
"12/08/2023 00:00:00" "12/08/2023 23:59:59"
并执行后，会得到一堆结果，但跑着跑着会跳出
error in initial response from server: 21
Error 'AX_ENOTCONN' querying IP History database
有人遇过吗？我该怎么解决呢？