BT action that assigns [member value] to the [member variable] and then returns [code]SUCCESS[/code]. BTSetVar assigns [member value] to the [member variable] and then returns [code]SUCCESS[/code]. Optionally, it can perform a specific [member operation] before assignment. Returns [code]FAILURE[/code] if it fails to set the [member variable]. Specifies the operation to be performed before assignment. Operation is executed as follows: [code]variable = variable OPERATION value[/code] Parameter that specifies the value to be assigned to the variable. Name of the variable to which the value will be assigned.