IM update notification

Hi Team,


I am trying set IM update notification for the group, When any one updates the ticket irrespectively the concern team will receive the notification.


Condition: assignment in $L.file="Service Desk Support Team" and not  (same(nullsub(assignment in $, "Empty"), assignment in $L.file))






The notification are not getting triggered with this condition.


If I am using this condition:true , Now emails are triggering but recieving error bad argu passed.