Two close energy states



 Dear all,
 
When doing some optimization, the energy values flutuates between two close values alternatively. As far as I know, it seems like there are two close energy states and the optimization algorithm is not able to choose for one. Is there any way to solve this problem?
 Thanks,
 Antonio
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 = Antonio Morreale                  =
 = Departamento de Química Orgánica  =
 = Universidad de Alcalá             =
 = Ctra. Madrid-Barcelona Km. 33,600 =
 = Alcalá de Henares                 =
 = 28871 Madrid                      =
 = Spain                             =
 = Tlf. + 34 91 885 46 49            =
 = Fax. + 34 91 885 46 86            =
 = email: antonio.morreale ^at^ uah.es    =
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