Hi, 
i have same problem with the jmeter 

Exception in thread "main" java.lang.UnsupportedClassVersionError:
org/apache/jm
eter/NewDriver (Unsupported major.minor version 48.0)
        at java.lang.ClassLoader.defineClass0(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

----
>java -version
java version "1.3.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1
Java HotSpot(TM) Client VM (build 1.3.1_01, mixed mode)

So, i would go for the upper version for java?

Thanks
Gurpreet 


Anjaneyulu Aerrolla wrote:
> 
> Yes it's Java version , jmete-2.3 requires java 1.4 runtime
>  
>  
> Regards
> 
> Anjan
> Sapient , 1 Penn Plaza, NY 
> 1-551-998-7184
> 
> 
> -----Original Message-----
> From: deynon [mailto:[email protected]] 
> Sent: Thursday, November 15, 2007 10:57 AM
> To: [email protected]
> Subject: JMeter won't start. Is Java Runtime version the problem? See
> below
> 
> 
> This is what happens. Thanks in advance....
> 
> E:\jakarta-jmeter-2.3\bin>jmeter
> Exception in thread "main" java.lang.UnsupportedClassVersionError:
> org/apache/jm
> eter/NewDriver (Unsupported major.minor version 48.0)
>         at java.lang.ClassLoader.defineClass0(Native Method)
>         at java.lang.ClassLoader.defineClass(Unknown Source)
>         at java.security.SecureClassLoader.defineClass(Unknown Source)
>         at java.net.URLClassLoader.defineClass(Unknown Source)
>         at java.net.URLClassLoader.access$100(Unknown Source)
>         at java.net.URLClassLoader$1.run(Unknown Source)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(Unknown Source)
>         at java.lang.ClassLoader.loadClass(Unknown Source)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
>         at java.lang.ClassLoader.loadClass(Unknown Source)
>         at java.lang.ClassLoader.loadClassInternal(Unknown Source)
> 
> E:\jakarta-jmeter-2.3\bin>java -version
> java version "1.3.1_01"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_01)
> Java HotSpot(TM) Client VM (build 1.3.1_01, mixed mode)
> -- 
> View this message in context:
> http://www.nabble.com/JMeter-won%27t-start.-Is-Java-Runtime-version-the-
> problem--See-below-tf4814761.html#a13773931
> Sent from the JMeter - User mailing list archive at Nabble.com.
> 
> 
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View this message in context: 
http://www.nabble.com/JMeter-won%27t-start.-Is-Java-Runtime-version-the-problem--See-below-tp13773931p23400476.html
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