我不确定是什么导致了这个错误，但这是整个错误所说的内容，这也是一个通知，阻止我使用更新管理器更新任何软件 - 请提供一些帮助或告诉我如何找出什么做修复它。
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
Please report this bug against the 'update-manager' package and include the following error message:
'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
由于此错误，我重新安装了 mono-runtime并已解决。
但现在我想卸载它（但在 Ubuntu 13.10 中）。所以这就是发生的事情：
hogar@hogar-desktop:~$ sudo apt-get purge mono-runtime
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies: …