As requested by the moderator, this is a new thread from an existing thread in the forum found at http://answers.microsoft.com/en-us/windowslive/forum/livemail-email/windows-live-mail-error-the-message-could-not-be/f10e4f74-5035-4324-9e96-09966f9a38ab?page=3&tm=1374622386894) .  My problem is that when I try to send an email to a Category List in Windows Live Mail 2012, I get an error message saying:

"The message could not be sent”

“Type an email address for one or more recipients in the To, cc, or Bcc box”

I have tried going through the repair process for Windows Live Mail and have uninstalled / reinstalled the program, but the problem persists. 

The problem will not occur the first time an email is sent to a Category list, but if I close Windows Live Mail, and re-start, the error will occur.