eclipselink PersistenceUnitLoadingEception in executable JAR

Question

I am developing a stand-alone java application which uses eclipselink. It is all fine when I execute the app from eclipse IDE. But I\'ve exported an executable JAR file, and

Answer 1

I have managed to solve it. I changed the way eclipse exports the jar file. If it extracts required libraries into the jar everything works great. Thank you anyway!