I used contact category (group of contacts) in Bcc field to send the same message to the group.

For last few days when I include that category  or another one (I have 3 different categories) in Bcc field WLM complains in the following message:

"

The message could not be sent.

Type an email address for one or more receipients in the To, Cc or Bcc boix.

"

I have not changed (add, removed) my contacts nor category in few months.

What is wrong?

/jas