从另一个屏幕会话中启动屏幕会话

I made a script, that runs in a screen session. This script shall run several new scripts in a new screen, if they are down. (They crash frequently, so this is necessery). But for some reason, the script does not start a new screen. It is no error seen on the screen, when the script tries to start the new screen and the script does not abort work. So I think there is a problem to launch a new screen from within another screen.I made a script, that runs in a screen session.