What is the keystroke code for space bar in applescript?

Solution 1:

Your sample code works properly on my machine (running OS X 10.11.6).

If keystroke space does not work on your machine, try the following:

tell application "System Events"
  key code 49 -- space bar
end tell

Here is a list of key codes for your reference:

AppleScript key codes for keys

Source:

tell application "System Events"
    key code 49
end tell