error while loading shared libraries: libXm.so.3To get the libXm library you need to get OpenMotif package, which is available from the RPMFusion repository.
Fire up a terminal:
sudo yum install wget
RPM Fusion provides software that the Fedora Project or Red Hat doesn't want to ship.wget http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm
sudo rpm -if rpmfusion-free-release-stable.noarch.rpm rpmfusion-nonfree-release-stable.noarch.rpm
Motif is the industry standard toolkit for UNIX systems and Open Motif, based on the Motif source code, provides a freely available version for open source developers.sudo yum install openmotif.x86_64
Now just link the package to where it should usually be found:
sudo ln -s /usr/lib64/openmotif/libXm.so.4 /lib64/libXm.so.3
P.S.: You can always use yum whatprovides *missing_library_name.so to see what package provides a missing library.