Auto Cancel Orders Plugin Issues

Hi,

Besides the obvious reasons (plugin disabled, not with "public" access, "last cron update" date in the far future, cron not running, etc), here are things that could be problematic:
- if you have the "notify" option activated, it will send an email notification for each order. Sending an email can take a long time, and if there is a bug in the email notification generation, it can crash the process, stopping the status change of all the orders being processed.
- the plugin will only be changing the status of 20 orders on each cron trigger in order to reduce the possibility of a crash during the processing, so maybe it's actually working but you didn't notice. If you have 4000 orders to change, and the plugin is triggered once every 6 hours, it will take 50 days to process all the orders. Note that the goal of the plugin is to process the new orders. Not to process a backlog of 4000 orders. So I would recommend to first do a mass action for the really old orders and then you can let the plugin handle the new orders from that point on.
- the plugin will use the statuses configured under the "created" and the "cancelled" columns of the System>Order statuses menu. So maybe there is a problem with the way the statuses are configured ?