Hi all, it would be nice to use the RooFitCore package within our stuff, but at the moment this is not possible since our Root tools requires at least Root 3.01-06 whereas RooFitCore requires at most Root 3.00-06...perhaps this problem can be solved by a simple trick since when I try to compile the RooFitCore shared library in the Root 3.01-06 environment I get the following error: (I have set ROOTSYS=/afs/slac.stanford.edu/package/cernroot/30106, ROOTVER=3.01-06) noric05(~/beta/anal11:) gmake RooFitCore.rootlib ROPT=-Shared GNU Make version 3.79.1, Build OPTIONS = Linux2-Debug-native-Objy-Optimize-Fastbuild-Shared-Lshared-Lstatic Note: OO_FD_BOOT undefined, you may need to run setboot if you need objectivity -> RooFitCore.rootlib: (Tue Nov 20 10:33:43 PST 2001) Creating ROOT IO source. [rootcint-1] /bin/sh: /afs/slac.stanford.edu/g/babar/package/root/3.01-06/Linux2-gcc-2.95.2/bin/rootcint: No such file or directory This because in /afs/slac.stanford.edu/g/babar/package/root/3.01-06/ there is only the "Linux2" subdirectory...and any attempt that my limited knowledge of gmake could think of in order to convince gmake to use "Linux2" instead of "Linux2-gcc-2.95.2" was unsuccessful. What do you think? Of course, I have successfully compiled RFC in Root 3.00-06, but I cannot use it in 3.01-06! Cheers, Concezio.