AutoCAD MEP

[#1]

I opened a drawing this morning and all of my mvpart connections were gone.  Is there a way to get them back?  Thanks!

[#2]

I also noticed that mvparts that weren't originally connected to anything retained their connections.  For example: I have a group of vavs that I created off to the side to copy and place as needed.  That group of vavs retained thier connections, but the vavs that were connected to duct lost thier connections. 

[#3]

Did you ever come across a solution for this, I just recently experienced this in a file fattempt 2012 please help....

[#4]

I can't recall exactly since it it's been so long, but I may have copied everything to a new drawing.  I don't know if I figured it out though.