kontact5 version 16.08.0-81.5; libKF5AkonadiCore5 version 16.08.0-54.12: test001@linux-n5z5:~> kontact kontact: symbol lookup error: /usr/lib64/libKF5AkonadiCore.so.5: undefined symbol: _ZNK23KExtraColumnsProxyModel11hasChildrenERK11QModelIndex test001@linux-n5z5:~>