I am new user or JFEFF 9.6.4, which I use doing my dissertation in Institute of Nuclear Physics PAN in Cracow. I use Windows 7 Professional N and I have problems with JFEFF. Therefore I can open files in It, but when I try to Save&Run there are some errors. I attached a screenshot with errors showed in command window in attachment. I tried to solve this by instaling different versions of JAVA, runnig as an admin and also check whether It is not my antivirus, but none of them helped.