Script does not work at startup from /system script

RouterOS Scripting
1

Why if you run this script


:global a true
:global b true

:if ($a = true) do={:global InterfaceName "ether1"}

:if ($b = true) do={:global MacAddress [/interface ethernet get [find where name=$InterfaceName] mac-address]}

using command


/system script run <script id>

it does not work, and if you run this script


:global a true
:global b true

:if ($a = true) do={:global InterfaceName "ether1"}

:global InterfaceName $InterfaceName

:if ($b = true) do={:global MacAddress [/interface ethernet get [find where name=$InterfaceName] mac-address]}

using the same command


/system script run <script id>

does it work?

And if you run this script using copying and pasting into the terminal, both options work

This is bug?

2

It’s expected. Try reading about the “scopes” in the scripting manual - there is identical example.
https://wiki.mikrotik.com/wiki/Manual:Scripting#Local_scope

Note that even variable can be defined as global, it will be available only from its scope unless it is not already defined.

3

Thanks! I understand! I did not think that in relation to the global this applies..