title: Flash Builder: Unable to Export error
body: <p>I have a a few Flex Builder 3 projects (SDK 3.2/3.5) that I imported into Flash Builder 4. They run fine in debug mode (IE, Firefox, Chrome), with all the swf's and swc's appearing in the bin-debug folder. But, when I try to do an Export Release Build on the main project, I get the following error: </p>
  
  <pre><code>    "One or more errors were found while trying to 
  build the release version. Unable to export."
  </code></pre>
  
  <p>There is no in errors in the Problems tab, and nothing appears in Console. Just have to hit ok and quit the process. </p>
  
  <p><strong>UPDATE:</strong> @doc_80 - I checked the log file, error caused by: </p>
  
  <pre><code>Caused by: java.lang.NoClassDefFoundError: flex2/tools/
       oem/OEMException$CircularLibraryDependencyException
  </code></pre>
  
  <p>Will look into the .project file as suggested by @doc_80</p>
  
  <p>Has anyone else seen this, or know of a fix? I looked a the adobe forum, but their solution to change linked resourses didnt help at all. </p>
  
  <p>Brian</p>