Hi Maria, When you get this error, that usually means that some C++ headers are missing. So check out some lines before this message and you should see a kind of message that says : *****.h not such file or directory. Then you have to install this file with its corresponding library (usually the library is already installed (in Ubuntu) but you have to install the 'devel' package (with 'aptget' in command line or 'synaptic' in GUI in Ubuntu)) So you have to search for the corresponding package but I can't help you if I don't know what kind of header is missing. Nevertheless, it's look like that you have some missing package in your X11 directory (graphical package), so I think that according to my experience, you have to reinstall the 'mesa' package (in Ubuntu), and/or maybe (I say maybe ...) the Xpm library (and its 'devel' package). It would be better if we could see all your 'print out' error messages. Cheers, Simon <div>2007/12/7, Maria Holstensson <<a href="mailto:Maria.Holstensson@icr.ac.uk"> Maria.Holstensson@icr.ac.uk</a>>:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Dear Gate users, I'm in the process of installing Gate 3.1.2 on a laptop with Ubuntu 7.10. I've come to the stage of installing Geant 4.9.0. After the './Configure -build' procedure I get these error messages: /usr/include/Xm/Xm.h:827: error: 'XPContext' does not name a type /usr/include/X11/extensions/Print.h:46: error: 'XPFinishProc' has not been declared Has anyone had the same error messages or have any idea how I can get around them? Any hints or tips very much appreciated! Thanks in beforehand, Maria Holstensson The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP. This e-mail message is confidential and for use by the addressee only.  If the message is received by anyone other than the addressee, please return the message to the sender by replying to it and then delete the message from your computer and network. _______________________________________________ Gate-users mailing list <a href="mailto:Gate-users@lists.healthgrid.org">Gate-users@lists.healthgrid.org</a> <a href="http://lists.healthgrid.org/mailman/listinfo/gate-users"> http://lists.healthgrid.org/mailman/listinfo/gate-users</a> </blockquote></div>