How to get variable from asterisk macro?

Question

Asterisk

How to get a variable from a macro that runs during DIAL?
SOMEVAR is empty in the main context. The same situation is with GoSub.

[incoming]
exten => trunk_78888888888,1,Dial(SIP/trunk_78888888888/79999999999,,gM(example))
exten => trunk_78888888888,2,NoOp(${SOMEVAR})

[macro-example]
exten => s,1,SET(SOMEVAR=456)

Answer 1

If the channel is the same, then the variable will have a value, if the channel is different, then resp. will be empty.
Act as you have already been suggested, or you can still use SHARED, but for this you need to clearly understand which channel you are currently in when processing the dialplan.

Answer 2

Use variable inheritance: voip.rus.net/tiki-index.php?page=Asterisk%20Variables
exten => s,1,SET(__SOMEVAR=456)