Troubles with Compiling Into JARs

When I try to compiel project into JARs using build.xml file, I get following:

Buildfile: D:jmebuild.xml
Overriding previous definition of reference to classpath

crazy idea, but maybe you have just the jvm installed, or it's not in your path?  Does typing javac on your command line work?

Vol, the javac.exe command line tool only comes with the JDK version of java (as opposed to the JRE). Even if you have it downloaded, Eclipse will default to using the JRE for some reason. This thread may help you:

Thank you very much. I just change C:Program FilesJavajre1.6.0  to  C:Program FilesJavajdk1.6.0 in Intalled JREs settings.