thank you again Gavin, i resolved the problem as the following :
-create a case.joint by a normal x joint -modification of case.joint with wanted values ( energies and k values ) -execute a small program fortran to formate modified case.joint respecting kram.f read format (f13.5,9(1x,e18.8). - execute x kram to generate case.epsilon : in this case.epsilon containning n and k i hope that is physically correct , since it is a mathematical transformation. so if we can past from Im to Re with kk transformation we can also past from k to n with the same transformation. Reagards -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20130307/f75e1395/attachment.htm>