This error happens because the dynamic linker cannot resolve the xmlIsDigitGroup symbol. This symbol is defined in the Gnome library for XML (libxml2).

One possible solution is to change your LD_LIBRARY_PATH to include the path to where this library is installed. If one gets the package from sunfreeware.com, it would typically go into /usr/local/lib.

I know this posting is old, but I just ran into this recently, so I wanted to post a solution for future reference.