Log Window
The Log Window appears on the screen when you select
"Log Window" item in "Window" menu of the menu bar.
During the log window is shown, the error and another messages are
added in the log window instead of a dialog window appearing
on the center of the screen.
When the script is compiled, the source code is shown in this window.
You can print the content of log window by selecting
"Print" item in "File" menu in the menu bar.