Keychain error 100001 when attempting to reconnect time machine.
I upgraded on a fresh install to El Capitan (My first clean install and it will be my last!) about 3 weeks ago, a million and one issues but worked through them all except this one. I've had no Backups for 10 days on my Time Machine which gives the following warning; Keychain error 100001 occurred while creating a System Keychain entry for the username “user name” and URL “afp://user name@my_Airport._afpovertcp._tcp.local./backup”. The interesting thing here is that the backup was working better than ever and I think the problem began when I deleted the original profile "users name" once the new "user name" profile was completely active.
I have edited the keychain to no avail, used the repair keychain utility, no better, deleted the keychain completely, same error ... renamed the time machine, the backup, recreated the original profile, deleted the lot (time machine, server through airport utility) removed virus protection opened firewall.... no change still the same error. I'm no so frustrated I'm ready to toss it out the window. No problems backing up to an old samsung drive... slow as a wet wick but toodling along nicely. So any help would be appreciated - Thanks,
iMac (27-inch Mid 2011), OS X El Capitan (10.11.1), 16GB RAM
