Hello Gustaf, I have the following problem when trying to compile NX on freshly installed Linux x86 system against latest TCL 8.6 from SourceForge CVS. ./generic/nsf.c: In function ‘MethodDispatchCsc’: ./generic/nsf.c:6959: error: too many arguments to function ‘tclIntStubsPtr->tclNRRunCallbacks’ make: *** [nsf.o] Error 1 Thank you