Error while installing check style plugin for eclipse

Question

I am getting the following error while installing the checkstyle plugin for my eclipuse via the update manager

Cannot complete the install because one or

Answer 1

When you attempt to install is Contact all update sites during install to find required software checked ? If not, it should be :

Expected Result

When using the update site in OP's post, following is the expected result :

Offline Installation

From this page :

Alternatively the Checkstyle Eclipse Plug-in can be downloaded from the Eclipse Checkstyle Plug-in's SourceForge download site. The download consists of a archived update site (file name net.sf.eclipsecs-x.x.x.buildstamp-updatesite.zip), containing all mandatory and optional parts of the plugin.

The plugin can be installed from the archived update site in the following ways:

1. Via Eclipse's P2 Installation Manager similar as described above, pointing to the archive file instead
2. Extracted into Eclipse's dropins folder. 

So, the steps are as follows :

1. Download the file referred above from here

2. Add the downloaded file as an 'Archived Download site' like so :

3. After that you should get the following :