Xlib: connection to "displayingMachine:0.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key
couldn't connect to display "displayingMachine:0.0" at /usr/local/ActivePerl-5.6/lib/site_perl/5.6.1/sun4-solaris-thread-multi/Tk/MainWindow.pm line 55, <STDIN> line 1.
MainWindow->new(-title,CalTool,-width,500) at cal.pl line 860