and after removing the dialer and reloading, all dialers responded with no free dialer (IOS ver. 11.2(14) on a 3620).
Removing all dialers (and the pri-group, which was probably not needed), reloading and configuring it all again, all the dialers were available.
It will probably take a few days before I try backup interface again. (What I was really trying to do was to make a backup load command, I had allready configured static backup of dynamic routing with success).
have you ever experienced no free dialer error in dial-backup
I can debug it and send it to you individually..