I added the following line to my .screenrc script such that I can use my mouse to scroll up and down in the terminal when the output is too large and long. However, when I try to source .screenrc script. It complains that termcapinfo command not found. termcapinfo xterm ti@:te@I have no idea what went wrong ? Why is this happening ? 
Terminal: termcapinfo command not found
terminal;gnu screen;xterm
You should not source it. The file .screenrc is read and interpreted by screen at start up.Moreover please note that termcapinfo xterm ti@:te@ will work only if your terminal set $TERM variable to xterm. In other casetermcapinfo xterm*|rxvt*|kterm*|Eterm* ti@:te@is probably more universal solution.There is also possibility to scroll by keyboard shortcut Ctrl-a ESC and then use up-down arrows.