NotifySync Device Client:

Behavior
My BlackBerry device keeps displaying a low memory alert.

Information
When memory drops below 20,000 free bytes (2MB) during sending/receiving, an alert tone sounds and a dialog shows stating how much memory needs to be cleaned up.  In order for NotifyLink/NotifySync to run properly, the device must have at least 2MB of space available.  Prior to the dialog appearing, a low memory cleanup routine runs on the device in an attempt to rectify the problem.  So, if you keep seeing the dialog, the device has done all it can on its own and you are probably at a point where you need to free up some space. 

Solution
Free up some space by eliminating what you are not actively using. You can do this by:
 - cleaning up old data and turning on your clean-up options from the Notify Preferences menu
 - removing unnecessary applications or language packs
 - archiving data (such as attachments, pictures, custom ringtones, etc.) to the SD card storage

Sending/receiving will not continue until there is at least 20,000 bytes of free memory.