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Hi Doerte, I might be wrong, but I think the situation is as follows: - Matlab 2006a was a 32-bit piece of software, which was happy to run on your 64-bit machine in 32-bit mode. The SPM mex files were compiled for 32-bit Linux, so everything was fine. - Matlab 2007a is (or at least may be) a genuine 64-bit program, hence it runs in true 64-bit mode on your 64-bit hardware; this breaks SPM's 32-bit mex files -- it's not a Matlab or SPM bug, just that 64-bit Matlab requires 64-bit mex files. - So you need to recompile the mex files, which requires "make" and a c-compiler, like gcc. Most Linux distributions have some kind of package manager, perhaps with some concept of tasks, and will install make, gcc, and a bunch of other development tools, if you select something like the "C/C++ Development" package/task. I'm afraid I can't help any more than that, as this depends on your Linux distribution -- ask your tech support to set-up a standard C programming environment on your Linux box, if possible. Best, Ged. Doerte Spring wrote: > Dear SPMler, > > I have a display problem on my linux 64-bit machine using SPM5 with matlab > 2007a. > I found a previous discussion about this problem on the list suggesting a > trick - recompiling mex files. So, I tried to apply this method as well > (thanks Ged for the exact instructions - I understand it now). By using the > "make" command, another problem occurred. Obviously, the gcc command was not > found either which I don't understand. > I have to add, that I just upgraded the matlab from 2006a to 2007a. With the > previous matlab version everything was fine. No display problems, no need > for recompiling etc. > As I understand the gcc comes along with the linux system/installation, but > linux as well as SPM5 did not change during the upgrade of matlab. Is the > display problem rather caused by the new matlab version? Is it maybe a bug? > > That is why I want to ask the experts on this list for some advise on what > to do or to try. > > I really appreciate any comments. > Many thanks in advance. > > Sincerely, > > Doerte >