It worked! I tried the "Delete Missing Assets" and it worked, three times. I opened a route a choose used the "Delete Missing Assets" option, after about a couple of minuteness I got the message "Clone or Unlock" the route layer, I unlocked the route layer and repeated the process. Merged session into layer and re-saved the route. CM showed no dependencies were missing, after exit. The only time this did not work is when the dependency was on the DLS, downloading the dependency cleared it. Using build 61388.
John