[Pw_forum] Error in routine bands (1): gamma_only case not implemented

[zafar rasheed]

Dear All 
I want to calculate band gap of some semiconducting material. But when I run nscf file it gives following error

 [ Program BANDS v.5.0.2 (svn rev. 9392) starts on 22Jan2013 at 11:25:29 

     This program is part of the open-source Quantum ESPRESSO suite
     for quantum simulation of materials; please cite
         "P. Giannozzi et al., J. Phys.:Condens. Matter 21 395502 (2009);
          URL http://www.quantum-espresso.org", 
     in publications or presentations arising from this work. More details at
     http://www.quantum-espresso.org/quote.php

     Serial version

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     Error in routine bands (1):
     gamma_only case not implemented
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
]

Some body help me please.
Muhammad Zafar

PhD Scholar

Department of Physics

The Islamia University of Bahawalpur,Pakistan
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