The instruction dropqueue removes a queue:
dropqueue 'queue_name'
When this instruction is executed, the queue queue_name turns non-existing. If an action block tries to read the queue 'queue_name' the RXS program will terminate in error - unless a )notrigger clause catches the exception (see section 12).
dropqueue is relevant when an action block wants to create a new content in a queue which is formerly created by another action block.