Brooke Mueller and Denise Richards are locked in a conference room right now ... as officials from the L.A. County Dept. of Children and Family Services try to force a truce in their war over Bob and Max ... but Charlie Sheen was a no-show.
Sources connected with the warring families tell TMZ -- Dr. Charles Sophy, the Medical Director for DCFS -- called the meeting and wants Denise, Brooke and Charlie to come face-to-face to deal with what has become a child-rearing crisis.
You may remember Dr. Sophy -- he's a highly-respected shrink who was a key player in the Michael Jackson molestation trial in 2005.
We're told Charlie was invited but didn't attend -- we don't know why.
The goal of the meeting -- to figure out a custody arrangement that keeps Denise in the picture and gives Brooke sufficient parental rights.
As we first reported ... Denise feels that she can't continue on as the temporary guardian of the troubled twins with Brooke constantly blocking her ability to seek treatment for some serious psychological problems the twins are experiencing.