Dear community, I have been trying to compile FSL on a Windows XP system under Cygwin, but have been unsuccessful so far. I get lots of errors, starting in the installation of Tk; I'm assuming that that's the cause of most of the errors I get later on. I checked the build.log file, and found the first error in Tk to be /usr/local/fsl/extras/src/tk/unix/../generic/default.h:21:29: tkWinDefault.h: No such file or directory after that comes a whole list of errors as below: /usr/local/fsl/extras/src/tk/unix/../generic/tkButton.c:66: error: `DEF_BUTTON_ACTIVE_BG_COLOR' undeclared here (not in a function) /usr/local/fsl/extras/src/tk/unix/../generic/tkButton.c:66: error: initializer element is not constant /usr/local/fsl/extras/src/tk/unix/../generic/tkButton.c:66: error: (near initialization for `labelOptionSpecs[0].defValue') etc. Does anyone have any ideas as to what's going on? I'm not much of a Linux / C++ guru, but I don't think missing header files are a good start to compiling a program :-) Here's some system info that might be important: Intel Pentium 4 Core 2 6300 Windows XP 2002 SP2 Cygwin installation with all options selected gcc 3.4.4 (cygming special, cdg 0.12, using dmd 0.125) Thanks a lot in advance, Kind regards, Marnix Maas Postdoc Physicist Netherlands Cancer Institute / Antoni van Leeuwenhoek Hospital Department of Radiotherapy Plesmanlaan 121 1066 CX Amsterdam The Netherlands Tel: +31 20 512 1729 Fax: +31 20 512 1745 e-mail: [log in to unmask]