yum install gnuplot

gnuplot.i386 0:4.0.0-12

Error: Missing Dependency: perl(HTML::Entities) is needed by package gnuplot.

But HTML::Entities already install.
I force re-install HTML::Entities but gnuplot still error and can't install.

HTML::Entities is up to date (1.35).

/scripts/perlinstaller --force HTML::Entities