Hello, Are you running an X11 session on OSX? If so can you try running the following command defaults write org.macosforge.xquartz.X11 enable_iglx -bool true ( you might need to close and restart xquartz after this ) and then try running fsleyes again? Kind Regards Matthew -------------------------------- Dr Matthew Webster FMRIB Centre John Radcliffe Hospital University of Oxford > On 17 Jan 2018, at 15:31, Giuseppe Cappellacci <[log in to unmask]> wrote: > > Hi, > > when I try to run fsleyes, I always get the same error and I don't know how to fix it. Can anyone help me? here's the code: > > > libGL error: unable to load driver: nouveau_dri.so > libGL error: driver pointer missing > libGL error: failed to load driver: nouveau > libGL error: unable to load driver: nouveau_dri.so > libGL error: driver pointer missing > libGL error: failed to load driver: nouveau > libGL error: unable to load driver: swrast_dri.so > libGL error: failed to load driver: swrast > The program 'fsleyes' received an X Window System error. > This probably reflects a bug in the program. > The error was 'BadValue (integer parameter out of range for operation)'. > (Details: serial 767 error_code 2 request_code 155 minor_code 24) > (Note to programmers: normally, X errors are reported asynchronously; > that is, you will receive the error a while after causing it. > To debug your program, run it with the --sync command line > option to change this behavior. You can then get a meaningful > backtrace from your debugger if you break on the gdk_x_error() function.) >