Getting an error after migrating to a new system when adding private keys to ssh-agent
/usr/bin/keychain -q --nogui $HOME/.ssh/id_rsa.key
* Error: Problem adding; giving up

Manually adding the key shows a permission problem
 ssh-add ~/.ssh/id_rsa.key
 chmod 700 /home/pwi/.ssh/*.key
 
In .bashrc
  /usr/bin/keychain -q --nogui $HOME/.ssh/id_rsa1.key
  /usr/bin/keychain -q --nogui $HOME/.ssh/id_rsa2.key
  source $HOME/.keychain/$HOSTNAME-sh