[Pw_forum] the error about the phonon at Gamma

[Shaorui Sun]

 Dear all:
      When I calculate the phonon of HgO at Gamma point, the programme find eighteen irreducible representations, and after the calculation the eighteen representations(the convergence was achieved for all), an error message was shown as follows: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     from Multable : error #         2
      Not a group
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 stopping ...

Who could tell me what is the matter, and how to solve it?


Best Regards!
                        S. R. Sun
---------------------------------------------
Beijing Synchrotron Radiation Facility
Institute of High Energy Physics
Chinese Academy of Sciences
P. O. Box 918, 100049 Beijing
P. R. China
Tel: 0086+10 88236710
email:sunsr at ihep.ac.cn