Install Universal Wiki Converter -> NoClassDefFoundError

I wanted to install the latest version of the UWC, but got following error:

/opt/atlassian/confluence/uwc # ./
Exception in thread "main" java.lang.NoClassDefFoundError: com/atlassian/uwc/ui/UWCForm3
Caused by: java.lang.ClassNotFoundException: com.atlassian.uwc.ui.UWCForm3
at Method)
at java.lang.ClassLoader.loadClass(
at sun.misc.Launcher$AppClassLoader.loadClass(
at java.lang.ClassLoader.loadClass(
Could not find the main class: com.atlassian.uwc.ui.UWCForm3. Program will exit.

The documentation on,howcanIfixthis? refers to a UWC Forum, but the link doesn't exist.

Does someone have a solution for this?

We are using Confluence 5.4.4.

2 answers

1 accepted

0 votes
Accepted answer

Werner, seems the Confluence version you are running is not compatible with the plugin (Confluence Server 4.0 - 4.3.7)

Please refer:

Hope it helps!



@Werner Lembacher

Hey buddy,

Did you manage to resolve your issue? 

I have the same error as you and i have installed Confluence 4.3.7 

Hi Darren, we didn't start to use the UWC.

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