Many folks may already know this link, but for those of you that do not, there is some great information to be had here:
"List of Error and Warning messages (AX 2012)"
http://msdn.microsoft.com/en-us/library/bb530207.aspx
For those of you that are not developers, still a good link to glance over. You never know where you'll find your answer when you are looking for that nondescript AX error message!