# can't run loadtest

**URL:** <https://community.wowza.com/t/cant-run-loadtest/199>\
**Category:** Wowza Streaming Engine\
**Created:** [November 29, 2014, 6:26am UTC](https://community.wowza.com/t/cant-run-loadtest/199 "2014-11-29T06:26:52Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/system/32/447_2.png) [@system](https://community.wowza.com/u/system)\
**Post date:** [November 29, 2014, 6:26am UTC](https://community.wowza.com/t/cant-run-loadtest/199/1 "2014-11-29T06:26:52Z")

</div>

Hello

i have issues running the loadtest tool.

client config: windows 8 Wowza 4.1 java 8

server config:ubuntu 14 Wowza 4.1 java 8

error message from the console when launching performance.bat live:

```auto
Configure logging: file:///D:/Programmes/Wowza4/conf/log4j.properties
Error running test (live): java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.wowza.wms.bootstrap.Bootstrap.runTest(Bootstrap.java:1420)
        at com.wowza.wms.bootstrap.Bootstrap.main(Bootstrap.java:71)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/SystemUtils
        at com.wowza.wms.bootstrap.BootstrapSystemTuningInfo.getSystemTuningInfo
(BootstrapSystemTuningInfo.java:113)
        at com.wowza.wms.server.ServerTuningHandler.<init>(ServerTuningHandler.j
ava:248)
        at com.wowza.wms.server.Server.<init>(Server.java:865)
        at com.wowza.wms.server.Server.getInstance(Server.java:919)
        at com.wowza.wms.logging.WMSLogger.a(WMSLogger.java:82)
        at com.wowza.wms.logging.WMSLogger.log(WMSLogger.java:195)
        at com.wowza.wms.logging.WMSLogger.info(WMSLogger.java:238)
        at com.wowza.wms.performance.remote.PerformanceRemoteClientTest.run(Perf
ormanceRemoteClientTest.java:84)
        at com.wowza.wms.performance.PerformanceTest.run(PerformanceTest.java:57
)
        at com.wowza.wms.performance.PerformanceTestList.run(PerformanceTestList
.java:68)
        ... 6 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.SystemUtils
        at java.net.URLClassLoader$1.run(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)
        ... 16 more

```

thank you for your help

---

<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [November 29, 2014, 9:14am UTC](https://community.wowza.com/t/cant-run-loadtest/199/2 "2014-11-29T09:14:05Z")

</div>

Hello there,

You do need to use the Wowza 4 version. Please contact support@wowza.com for the latest load test tool.

Kind regards,

Salvadore

---

<div class="post-metadata">

**Author:** ![gabriel\_fg](https://avatars.discourse-cdn.com/v4/letter/g/a183cd/32.png) [@gabriel\_fg](https://community.wowza.com/u/gabriel_fg)\
**Post date:** [November 30, 2014, 4:24am UTC](https://community.wowza.com/t/cant-run-loadtest/199/3 "2014-11-30T04:24:31Z")

</div>

thx, i’m using version 4 everywhere (client and server Wowza 4.1, loadtool 4.0.1)

---

<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [December 1, 2014, 6:32am UTC](https://community.wowza.com/t/cant-run-loadtest/199/4 "2014-12-01T06:32:08Z")

</div>

Can you please verify that you have copied the contents of the **bin, conf, and lib** folders from the Load Test Tool download folder to the corresponding Wowza Streaming Engine installation folders.

And that you have run the examples installer in the [install-dir]/examples folder **[install-dir]/examples/installall.bat**

One other thing that you can try is in your run or debug configuration in eclipse, try adding the following to the VM Arguments on the Arguments tab.

```auto
-Dcom.wowza.wms.native.base="win"

```

If all this checks out and you still get this error, I would suggest you open a ticket with the support team. To do so please zip the following folders and send them to support@wowza.com. Include a link to this thread as a reference:

**[install-dir]/conf**

**[install-dir]/logs**

**[install-dir]/transcoder**

**[install-dir]/manager/logs**

Thank you.

Salvadore