# Unable to correct NMONVisualizer java error. Can someone help to decode this java error?

**URL:** <https://community.unix.com/t/unable-to-correct-nmonvisualizer-java-error-can-someone-help-to-decode-this-java-error/351732>\
**Category:** AIX\
**Created:** [April 5, 2015, 7:26am UTC](https://community.unix.com/t/unable-to-correct-nmonvisualizer-java-error-can-someone-help-to-decode-this-java-error/351732 "2015-04-05T07:26:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![okonita](https://community.unix.com/letter_avatar/okonita/32/5_5575768a8748004e209b776fc1b2916d.png) [@okonita](https://community.unix.com/u/okonita)\
**Post date:** [April 5, 2015, 7:26am UTC](https://community.unix.com/t/unable-to-correct-nmonvisualizer-java-error-can-someone-help-to-decode-this-java-error/351732/1 "2015-04-05T07:26:03Z")

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Hello AIX and Java gurus,  
I have a java error that I have no clue how to resolve. I am trying to run the popular NMONVisualizer utility against a NMON dataset and getting the error as shown below:

```nohighlight
/db2storage/NMON >java -jar NMONVisualizer_2015-02-02.jar com.ibm.nmon.ReportGenerator rasmq02hdqra_150404_1027.nmon

Exception in thread "main" java.lang.NoSuchMethodError: java.net.URLDecoder: method decode(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String; not found
        at org.eclipse.jdt.internal.jarinjarloader.RsrcURLConnection.getInputStream(RsrcURLConnection.java:42)
        at java.net.URL.openStream(URL.java:827)
        at sun.misc.URLClassPath$Loader.getResource(URLClassPath.java:449)
        at sun.misc.URLClassPath.getResource(URLClassPath.java:166)
        at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:676)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:239)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:516)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:448)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:220)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:54)

```

How ca I resolve this error? Immediate help needed.  
Thanks  
okonita

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<div class="post-metadata">

**Author:** ![agent.kgb](https://community.unix.com/user_avatar/community.unix.com/agent.kgb/32/9333_2.png) [@agent.kgb](https://community.unix.com/u/agent.kgb)\
**Post date:** [April 7, 2015, 4:31am UTC](https://community.unix.com/t/unable-to-correct-nmonvisualizer-java-error-can-someone-help-to-decode-this-java-error/351732/2 "2015-04-07T04:31:56Z")

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check your classpath