Electrostatic Potential with Gaussian



Hello,
 how can I obtain a CUBE file with electrostatic potential information?
 I have already received a CUBE file with density information with the
 following input:
 $rungaus
 #N STO-3G OPT FormCheck=ALL CUBE=Density Prop=Grid
 ethan
 0 1
 C 0.765 0.0 0.0
 C -0.765 0.0 0.0
 H 1.1283 -0.0097 1.0276
 H 1.1283 -0.8851 -0.5222
 H 1.1283 0.8948 -0.5054
 H -1.1283 -0.8948 0.5054
 H -1.1283 0.8851 0.5222
 H -1.1283 0.0097 -1.0276
 c2h6_dens.cube
 However, the CUBE file generation for EPOT will not work with this
 input:
 $rungaus
 #N STO-3G OPT CUBE=Potential Prop=Potential
 ethan
 0 1
 C 0.765 0.0 0.0
 C -0.765 0.0 0.0
 H 1.1283 -0.0097 1.0276
 H 1.1283 -0.8851 -0.5222
 H 1.1283 0.8948 -0.5054
 H -1.1283 -0.8948 0.5054
 H -1.1283 0.8851 0.5222
 H -1.1283 0.0097 -1.0276
 c2h6_epot.cube
 I use Gaussian 94. The log files show that Gaussian terminates normal.
 With regards
 Frank Oellien
 --
 Computer-Chemistry-Center and Institute of Organic Chemistry
 University of Erlangen-Nuernberg
 Naegelsbachstrasse 25, D-91052 Erlangen (Germany)
 Tel (+49)-(0)9131-85-26579  Fax (+49)-(0)9131-85-26566
 email: Frank.Oellien at.at chemie.uni-erlangen.de
 WWW  : http://www2.ccc.uni-erlangen.de/oellien/
        http://www2.ccc.uni-erlangen.de/ChemVis/