Command «find» somtimes failed with big address-lists

RouterOS Scripting
1

I have some thousands of the IP’s in ip firewall address-list.
Sometimes find command failed with error “no such item (4)”
Test script:

:local tmpAddress "104.16.109.203";
:local ListName "CENSORED";
:do {

:if ([/ip firewall address-list find address="$tmpAddress" list="$ListName"]="") do={
    :log info "not found";
} else={
    :log info "found $tmpAddress";
}

} on-error={:log info "bug bug bug"};

mikrotik_no_such_item_bug_2016-01-22_14-55-52.png

2

If at the same time when script is running, address-list table is modified then you could get this error.

3

How can i protect my scripts from this error? do={} on-error={} does not help.