with that little info you provide we can not help you,
please provide the full command line and let us know how large the
dataset is.
Could it be that the program is still running?
On what type of hardware did you execute the code?
The latest RAxML release is version 7.7.8 available here:
https://github.com/stamatak/standard-RAxML
Alexis
--
Alexandros (Alexis) Stamatakis
Research Group Leader, Heidelberg Institute for Theoretical Studies
Full Professor, Dept. of Informatics, Karlsruhe Institute of Technology
Adjunct Professor, Dept. of Ecology and Evolutionary Biology, University
of Arizona at Tucson
www.exelixis-lab.org