# Problem with servoy-updater.jar

**URL:** https://forum.servoy.com/t/problem-with-servoy-updater-jar/12683
**Category:** Classic Servoy
**Created:** [August 19, 2010, 10:27am UTC](https://forum.servoy.com/t/problem-with-servoy-updater-jar/12683 "2010-08-19T10:27:13Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Adelo\_Herrero](https://avatars.discourse-cdn.com/v4/letter/a/96bed5/32.png) [@Adelo\_Herrero](https://forum.servoy.com/u/Adelo_Herrero)
#### Post date: [August 19, 2010, 10:27am UTC](https://forum.servoy.com/t/problem-with-servoy-updater-jar/12683/1 "2010-08-19T10:27:13Z")

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Hello  
I have one server that only has installed servoy\_server with the next configuration:

```auto
CentOS release 5.4 (Final)
kernel CentOS release 5.4 (Final)

java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) Server VM (build 16.3-b01, mixed mode)

```

The problem is when I whant update. From the servoy\_server directory I write: java -jar servoy\_updater.jar and the result is:

```auto
Exception in thread "main" java.lang.NoClassDefFoundError: com/servoy/j2db/util/VersionCheck
Caused by: java.lang.ClassNotFoundException: com.servoy.j2db.util.VersionCheck
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: com.servoy.j2db.util.VersionCheck. Program will exit.

```

I have read this link [http://forum.servoy.com/viewtopic.php?f=1&t=11333#p56683](http://forum.servoy.com/viewtopic.php?f=1&t=11333#p56683) but:  
1.- The servoy\_update.jar corresponds to 5.1 version (is not obsolete).  
2.- servoy\_server/lib/j2db.jar is on the correct path.

Any idea on this?

Thanks.