it's because the java files have been compiled with a newer version of Java than the one are you using to run it. Make sure to have the latest JDK/JRE installed and correctly referenced in the PATH env variable.
Cheers, -- Raffaele Gravina | Research Engineer Wireless Sensor Networks Lab Berkeley 2000 Hearst Ave, suite 304 Berkeley, CA 94709 +1 510 666 0174 ext. 101 2009/7/21 bouzayani walid <[email protected]> > Hello, > > > I used Tinyos2.1 under Wondows XP and Telosb mot.e > > I installed and checked my Tos2.x environment and Telosb platforms without > error (tos-check-env results no erros). > > But when i run the oscilloscope application with* java > net.tinyos.tools.Listen.* many errors appear like: > > > $ java net.tinyos.tools.Listen > > > *Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad > version number in .class file > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:620) > at java.security.SecureClassLoader.defineClass(SecureClassLoader > at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) > at java.net.URLClassLoader.access$100(URLClassLoader.java:56) > at java.net.URLClassLoader$1.run(URLClassLoader.java:195) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:188) > at java.lang.ClassLoader.loadClass(ClassLoader.java:306) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) > at java.lang.ClassLoader.loadClass(ClassLoader.java:251) > at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)* > > > Whats problems? > Thanks in advance > ______________________________ > BOUZAYANI Walid > Research Engineer > CES Laboratory, ENIS Tunisia > [email protected] > GSM: (00216) 94 306 603 >
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