Error when installing jenkins workflow plugin
<p>I'm trying to install the Jenkins workflow plugin into a Jenkins 1.641 installation. I have downloaded the latest version of the plugin (v1.12 - <a href="https://wiki.jenkins-ci.org/display/JENKINS/Workflow+Plugin" rel="nofollow">https://wiki.jenkins-ci.org/display/JENKINS/Workflow+Plugin</a>). On trying to upload and install, I get this error:-</p>

<pre><code>java.io.IOException: Failed to dynamically deploy this plugin
at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1383)
at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:1161)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Failed to install workflow-aggregator plugin
at hudson.PluginManager.dynamicLoad(PluginManager.java:487)
at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1379)
... 5 more
Caused by: java.io.IOException: Dependency workflow-basic-steps (1.12), workflow-scm-step (1.12), workflow-cps-global-lib (1.12), workflow-support (1.12), workflow-job (1.12), workflow-durable-task-step (1.12), workflow-cps (1.12), workflow-api (1.12), workflow-step-api (1.12) doesn't exist
at hudson.PluginWrapper.resolvePluginDependencies(PluginWrapper.java:533)
at hudson.PluginManager.dynamicLoad(PluginManager.java:477)
... 6 more
</code></pre>

<p>Can anyone suggest the cause of the problem?</p>

<p>Thanks</p>