Sometimes, when you are running a Telnet interactive job, something in the net may go wrong and your Telnet session is no longer available.
After starting a new a new session, you may find that there is some file you can no longer access because the previous session did not end and is still locking it.
So you have to spend some time to find the name of that job and kill it.
If the same happens in a while, you may become a little upset.
Lower your stress and save your time.
Install this small utility. Command killmyjobs ends any other interactive job running under your user profile.