title: How Do You Upgrade From Eclipse Ganymede to Eclipse Galileo?
body: <p>I have written an RCP application that contains numerous plugin-ins I have created using Ganymede version 3.4.2.  I want to start using Galileo.  When I try to execute my RCP application from the Workspace I created using Ganymede I get lots of errors like the following:</p>
  
  <pre>
  !SESSION 2009-09-09 10:41:33.907 -----------------------------------------------
  eclipse.buildId=unknown
  java.version=1.6.0_12
  java.vendor=Sun Microsystems Inc.
  BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
  Framework arguments:  -product com.bah.gs.arts.jekyll.product
  Command-line arguments:  -product com.bah.gs.arts.jekyll.product -data C:\Workspace/../runtime-jekyll.product -dev file:C:/Workspace/.metadata/.plugins/org.eclipse.pde.core/jekyll.product/dev.properties -os win32 -ws win32 -arch x86
  
  !ENTRY org.eclipse.equinox.app 0 0 2009-09-09 10:41:35.469
  !MESSAGE Product com.bah.gs.arts.jekyll.product could not be found.
  
  !ENTRY org.eclipse.osgi 2 0 2009-09-09 10:41:35.500
  !MESSAGE One or more bundles are not resolved because the following root constraints are not resolved:
  !SUBENTRY 1 org.eclipse.osgi 2 0 2009-09-09 10:41:35.500
  !MESSAGE Bundle initial@reference:file:../../Common/plugins/org.eclipse.core.databinding_1.2.0.I20090604-2000.jar/ was not resolved.
  !SUBENTRY 2 org.eclipse.core.databinding 2 0 2009-09-09 10:41:35.500
  !MESSAGE Missing required bundle org.eclipse.core.databinding.observable_[1.2.0,2.0.0).
  !SUBENTRY 2 org.eclipse.core.databinding 2 0 2009-09-09 10:41:35.500
  !MESSAGE Missing required bundle org.eclipse.core.databinding.property_[1.2.0,2.0.0).
  !SUBENTRY 1 org.eclipse.osgi 2 0 2009-09-09 10:41:35.500
  !MESSAGE Bundle initial@reference:file:../../Common/plugins/org.eclipse.jface.databinding_1.3.0.I20090525-2000.jar/ was not resolved.
  !SUBENTRY 2 org.eclipse.jface.databinding 2 0 2009-09-09 10:41:35.500
  !MESSAGE Missing required bundle org.eclipse.core.databinding.property_[1.2.0,2.0.0).
  !SUBENTRY 2 org.eclipse.jface.databinding 2 0 2009-09-09 10:41:35.500
  !MESSAGE Missing required bundle org.eclipse.core.databinding.observable_[1.2.0,2.0.0).
  !SUBENTRY 1 org.eclipse.osgi 2 0 2009-09-09 10:41:35.500
  !MESSAGE Bundle initial@reference:file:../../Common/plugins/org.eclipse.ui.workbench_3.5.0.I20090603-2000.jar/ was not resolved.
  !SUBENTRY 2 org.eclipse.ui.workbench 2 0 2009-09-09 10:41:35.500
  !MESSAGE Missing required bundle org.eclipse.core.databinding.property_[1.2.0,2.0.0).
  !SUBENTRY 2 org.eclipse.ui.workbench 2 0 2009-09-09 10:41:35.500
  !MESSAGE Missing required bundle org.eclipse.core.databinding.observable_[1.2.0,2.0.0).
  </pre>
  
  <p><br>
  Why is upgrading from one Eclipse version to the next so painful?</p>
  
  <p>Is there a systematic way of resolving the above issues?</p>
  
  <p>Is there a "best practices" upgrade procedure available?</p>
  
  <p>Thanks for your help.</p>
  
  <pre>
  After trying what VonC suggested I am still experiencing some problems.
  
  This is the constraint part of the MANIFEST.MF for the RCP application:
  
  Bundle-RequiredExecutionEnvironment: JavaSE-1.6
  Require-Bundle: org.eclipse.core.runtime;bundle-version="3.5.0";resolution:=optional;visibility:=reexport,
   org.eclipse.ui;bundle-version="3.5.0";resolution:=optional;visibility:=reexport,
   org.eclipse.core.expressions;bundle-version="3.4.100";resolution:=optional;visibility:=reexport
  
  What is the significance of the "visibility:=reexport" and "resolution:=optional" parameters?
  
  Error messages:
  
  org.eclipse.core.databinding
  Missing Constraint:Required-Bundle: org.elclipse.core.databinding.observable;require-version="[1.2.0.2.0.0]"
  Missing Constraint:Required-Bundle: org.elclipse.core.databinding.property;require-version="[1.2.0.2.0.0]"
  
  Same two messages for:
  
  org.eclipse.jface.databinding
  org.eclipse.ui.workbench
  
  </pre>