java -jar sopc2dts.jar -t dts -i resolving version mismatches

[Altera_Forum]

Thanks in advance 

 I'm getting another computer up and running (been stuck in the old 'vendor_hwselect' due to supporting older projects).   I follow the wiki about DeviceTree. Now when I run the java -jar to get a *.dts I get: ************************************************************************************************* [janet@localhost sopc2dts]$ java -jar sopc2dts.jar -t dts -i /home/janet/Desktop/cycloneIII_3c120_niosII_standard_sopc.sopcinfo -o /home/janet/Desktop/my.dts Exception in thread "main" java.lang.UnsupportedClassVersionError: Sopc2DTS : Unsupported major.minor version 51.0  at java.lang.ClassLoader.defineClass1(Native Method)  at java.lang.ClassLoader.defineClass(ClassLoader.java:634)  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)  at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)  at java.net.URLClassLoader.access$000(URLClassLoader.java:73)  at java.net.URLClassLoader$1.run(URLClassLoader.java:212)  at java.security.AccessController.doPrivileged(Native Method)  at java.net.URLClassLoader.findClass(URLClassLoader.java:205)  at java.lang.ClassLoader.loadClass(ClassLoader.java:321)  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)  at java.lang.ClassLoader.loadClass(ClassLoader.java:266) Could not find the main class: Sopc2DTS. Program will exit. [janet@localhost sopc2dts]$  *******************************************************************************************  My java and javac versions are: ************************************************************************************** [janet@localhost Desktop]$ java -version java version "1.6.0_24" OpenJDK Runtime Environment (IcedTea6 1.11.4) (rhel-1.49.1.11.4.el6_3-i386) OpenJDK Client VM (build 20.0-b12, mixed mode) [janet@localhost Desktop]$ javac -version javac 1.7.0_07 [janet@localhost Desktop]$  **************************************************************************************** I'm assuming that the error is because I have version mismatches?  If so what do I need to do, step-by-step to get the sopc2dts working properly?

[Altera_Forum]

firstly, i would try sun's java, or rather oracles. next, just try java -jar sopc2dts.jar --gui 

 I would suggest posting further questions to the nios-linux mailing list.  --dalon