# Problem with Windows Server 2008 R2 **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [July 15, 2010, 10:36pm UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098 "2010-07-15T22:36:12Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Bo\_Feng](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@Bo\_Feng](https://community.wowza.com/u/Bo_Feng)\ **Post date:** [July 15, 2010, 10:36pm UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/1 "2010-07-15T22:36:12Z")
Hi all, I got this weird problem when running startup.bat on fresh installed windows server 2008 R2 standard server: Exception in thread “main” java.lang.NoClassDefFoundError: Files Caused by: java.lang.ClassNotFoundException: Files 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) Could not find the main class: Files. Program will exit. Any idea? Thanks a lot! ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [July 16, 2010, 11:59am UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/2 "2010-07-16T11:59:27Z")
What version of Java are you using? java -version You probably need to update. Use the latest JDK: [http://java.sun.com/javase/downloads/index.jsp](http://java.sun.com/javase/downloads/index.jsp) Richard ---
**Author:** ![Charlie\_Good](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/charlie_good/32/383_2.png) [@Charlie\_Good](https://community.wowza.com/u/Charlie_Good)\ **Post date:** [July 16, 2010, 4:43am UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/3 "2010-07-16T04:43:25Z")
Also, check the environement variables WMSAPP\_HOME and WMSCONFIG\_HOME to be sure they are set properly. Open a command prompt and type the following commands send post the results: ```auto echo %WMSAPP_HOME% echo %WMSCONFIG_HOME% echo %JAVA_HOME% ``` Charlie ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [July 16, 2010, 4:43pm UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/4 "2010-07-16T16:43:47Z")
I think it is the latest or very recent. Did you check the environment variables, per Charlie’s note? One thing to look for in those is a trailing slash which doesn’t belong. Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [July 16, 2010, 4:48pm UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/5 "2010-07-16T16:48:18Z")
Actually the first two do have the trailing slash. You have to remove those. It is a vexing occasional problem, not sure how it happens. Should be: > %WMSAPP\_HOME% = C:\Program Files (x86)\Wowza Media Systems\Wowza Media Server 2.1.1 > > %WMSCONFIG\_HOME% = C:\Program Files (x86)\Wowza Media Systems\Wowza Media Server 2.1.1 Richard ---
**Author:** ![Bo\_Feng](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@Bo\_Feng](https://community.wowza.com/u/Bo_Feng)\ **Post date:** [July 16, 2010, 8:41am UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/6 "2010-07-16T08:41:00Z")
> What version of Java are you using? > > java -version > > You probably need to update. Use the latest JDK: > > [http://java.sun.com/javase/downloads/index.jsp](http://java.sun.com/javase/downloads/index.jsp) > > Richard 1.6.0\_21, seems to be the latest version ---
**Author:** ![Bo\_Feng](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@Bo\_Feng](https://community.wowza.com/u/Bo_Feng)\ **Post date:** [July 16, 2010, 8:44am UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/7 "2010-07-16T08:44:13Z")
> Also, check the environement variables WMSAPP\_HOME and WMSCONFIG\_HOME to be sure they are set properly. Open a command prompt and type the following commands send post the results: > > ```auto > echo %WMSAPP_HOME% > echo %WMSCONFIG_HOME% > echo %JAVA_HOME% > > ``` > > Charlie %WMSAPP\_HOME% = C:\Program Files (x86)\Wowza Media Systems\Wowza Media Server 2.1.1\ %WMSCONFIG\_HOME% = C:\Program Files (x86)\Wowza Media Systems\Wowza Media Server 2.1.1\ %JAVA\_HOME% = C:\Program Files\Java\jre6 I don’t see any problem here. Since it’s a fresh installed 2008 R2 server, other ppl may experience the same problem. ---
**Author:** ![Bo\_Feng](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@Bo\_Feng](https://community.wowza.com/u/Bo_Feng)\ **Post date:** [July 16, 2010, 8:50am UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/8 "2010-07-16T08:50:59Z")
> I think it is the latest or very recent. Did you check the environment variables, per Charlie’s note? One thing to look for in those is a trailing slash which doesn’t belong. > > Richard You are right, it’s working now. Shouldn’t this be a bug? ---
**Author:** ![Bo\_Feng](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@Bo\_Feng](https://community.wowza.com/u/Bo_Feng)\ **Post date:** [July 16, 2010, 8:51am UTC](https://community.wowza.com/t/problem-with-windows-server-2008-r2/35098/9 "2010-07-16T08:51:44Z")
> Actually the first two do have the trailing slash. You have to remove those. It is a vexing occasional problem, not sure how it happens. > > Should be: > > Richard Got it, thanks a lot!