title: Eclipse plugin install error
body: <p>I'm trying to install the google plugin for eclipse but the installer keeps telling me :</p>
  
  <blockquote>
    <p>An error occurred during the
    org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase</p>
  </blockquote>
  
  <p>I've tried firstly to install from internet but then canceled it because of the poor speed. Then I download it and tried to install locally, then I have this problem. I'm using Eclipse 3.7.1 and the google plugin is also for version 3.7.</p>
  
  <p>I've tried also to clean up the configuration folder by deleting anythings has the name equinox but that's no use.</p>
  
  <p>Any suggestions? Thanks!</p>
  
  <p>Here goes the error log:</p>
  
  <pre><code>!SESSION 2012-02-03 06:30:06.977 -----------------------------------------------
  eclipse.buildId=M20110909-1335
  java.version=1.6.0_22
  java.vendor=Sun Microsystems Inc.
  BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_US
  Framework arguments:  -product org.eclipse.epp.package.java.product
  Command-line arguments:  -os linux -ws gtk -arch x86 -product org.eclipse.epp.package.java.product
  
  !ENTRY org.eclipse.equinox.p2.engine 4 4 2012-02-03 06:33:17.752
  !MESSAGE An error occurred during the org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase.
  !SUBENTRY 1 org.eclipse.equinox.p2.engine 4 0 2012-02-03 06:33:17.752
  !MESSAGE session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.CheckTrust, operand=, action=).
  !SUBENTRY 1 org.eclipse.equinox.p2.engine 4 0 2012-02-03 06:33:17.752
  !MESSAGE Error reading signed content.
  !STACK 0
  java.io.IOException: The file "/home/darkjh/eclipse/plugins/com.google.appengine.eclipse.core_2.5.1.v201201120043-rel-r37.jar" does not exist
      at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.&lt;init&gt;(ZipBundleFile.java:61)
      at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.&lt;init&gt;(ZipBundleFile.java:55)
      at org.eclipse.osgi.internal.signedcontent.SignedBundleHook.getSignedContent(SignedBundleHook.java:253)
      at org.eclipse.equinox.internal.p2.engine.phases.CertificateChecker.checkCertificates(CertificateChecker.java:67)
      at org.eclipse.equinox.internal.p2.engine.phases.CertificateChecker.start(CertificateChecker.java:49)
      at org.eclipse.equinox.internal.p2.engine.phases.CheckTrust.completePhase(CheckTrust.java:50)
      at org.eclipse.equinox.internal.p2.engine.Phase.postPerform(Phase.java:216)
      at org.eclipse.equinox.internal.p2.engine.Phase.perform(Phase.java:84)
      at org.eclipse.equinox.internal.p2.engine.PhaseSet.perform(PhaseSet.java:44)
      at org.eclipse.equinox.internal.p2.engine.Engine.perform(Engine.java:75)
      at org.eclipse.equinox.internal.p2.engine.Engine.perform(Engine.java:44)
      at org.eclipse.equinox.p2.operations.ProvisioningSession.performProvisioningPlan(ProvisioningSession.java:174)
      at org.eclipse.equinox.p2.operations.ProfileModificationJob.runModal(ProfileModificationJob.java:79)
      at org.eclipse.equinox.p2.operations.ProvisioningJob.run(ProvisioningJob.java:177)
      at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
  </code></pre>