How to pass variable from notification to global variable?

RouterOS The Dude
1

How to pass a variable from Dude notification to the script? I’m trying to set the value as a global variable but it doesn’t work. Put $a gives an empty result.
notif.JPG

2

Dude v6 - SMS notification through another ROS - using ssh-exec - step 5-6

Dude Notification

# Define Subject
:global notificationtext "Service [Probe.Name] on [Device.Name] is now [Service.Status]"

# Run script
system script run SMS-Notification-smspilot.ru

ROS Script

# Define subject
:global notificationtext "$notificationtext"