Overwrite & driver not working

[sandancer]

Does anybody have any suggestions on how i can cure this problem or is it hours of work gone again, when i try to enter quick drive from building my route it doesn't respond likewise when i try and overwrite my work nothing happens, this only happens with the one route i've created, would I have to delete the last few sessions to try and get rid of the problem or is there another way? many thanks to anyone who comments

 

[tomurban]

Have you tried deleting them in CMP?

 

[fran1]

Are you running as admin ?

 

[Lots_Trains]

Everyday, backup your Route and session, then the most u lose is one days work, I do it religously Cheers Lot