I have installed CYGWIN and XFREE on my windows 2000 PC. Then I connect to an AIX machine and run a CAD application "CATIA" . I get the following error Xlib: XInputExtension is missing on <myPC_IP>:0.0 I am guessing that I am either missing extension "XInputExtension" or it is disabled Can anyone help? Thanks Vishal Nangrani