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Editorial Team
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Asked: 2026-05-16T11:01:16+00:00

created an Eclipse plugin that contributes to the UI by a new project wizard

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created an Eclipse plugin that contributes to the UI by

  • a new project wizard
  • a new menu in the context menu of projects in the Package Explorer
  • a new project nature + builder
  • a new preference page for the plugin

The plugin works fine when installed in a normal Eclipse instance with Flex/Flashbuilder as plugin.

The problem now is, that the plugin never gets activated when i install it in a Flex/Flashbuilder Standalone instance. Neither of the features described above is available.

I even have no idea how to debug this, error-log (workspace/.metadata/.log) the following message appears, (but i dont think it is related to the problem)

!ENTRY org.eclipse.ui.workbench 2 0 2009-07-20 17:51:17.984
!MESSAGE A handler conflict occurred.  This may disable some commands.
!SUBENTRY 1 org.eclipse.ui.workbench 2 0 2009-07-20 17:51:17.984
!MESSAGE Conflict for 'org.eclipse.ui.navigate.openResource':
HandlerActivation(commandId=org.eclipse.ui.navigate.openResource, handler=ActionDelegateHandlerProxy(null,org.eclipse.ui.internal.ide.handlers.OpenResourceHandler),
expression=AndExpression(ActionSetExpression(org.eclipse.ui.NavigateActionSet,org.eclipse.ui.internal.WorkbenchWindow@1c45731),WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow@1c45731)),sourcePriority=16640)
HandlerActivation(commandId=org.eclipse.ui.navigate.openResource,
handler=ActionDelegateHandlerProxy(null,org.eclipse.ui.internal.ide.handlers.OpenResourceHandler),
expression=AndExpression(ActionSetExpression(com.adobe.flexbuilder.standalone.navigate,org.eclipse.ui.internal.WorkbenchWindow@1c45731),WorkbenchWindowExpression(org.eclipse.ui.internal.WorkbenchWindow@1c45731)),sourcePriority=16640)

In the “Configuration Details” my feature doesn’t show up in the *** Features: section and my plugin doesn’t show up in the *** Plugin-in Registry: section.
But they appear under Configured features and Configured plug-ins.

Starting FlashBuilder with -clean didn’t solve the problem.
(the start command is now “C:\Programme\Adobe\Flash Builder Beta\Gumbo.exe” -clean)

My plugin depends on

org.eclipse.ui,
org.eclipse.core.runtime,
org.eclipse.core.resources,
com.adobe.flexbuilder.project
com.adobe.flexbuilder.project.ui
com.adobe.flexbuilder.ui

All of these should be available, as i see it. (and an error should be generated if they were not, i hope)

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1 Answer

  1. Editorial Team

    I’ve solved “!MESSAGE Conflict” in log by editing file:

     Adobe Flash Builder 4\plugins\com.adobe.flexbuilder.standalone_4.0.1.277662\plugin.xml

    In this file next tag is unnecessary:

    <actionSet
    description="%standaloneDescriptionNavigationActions"
    id="com.adobe.flexbuilder.standalone.navigate"
    label="%standalone.navigate.flex.navigation"
    visible="true">
     <action
           definitionId="org.eclipse.ui.navigate.openResource"
           label="%OpenWorkspaceFileAction.label"
           helpContextId="org.eclipse.ui.open_workspace_file_action_context"
           class="org.eclipse.ui.internal.ide.handlers.OpenResourceHandler"
           menubarPath="navigate/open.ext2"
           id="com.adobe.flexbuilder.standalone.navigate.OpenWorkspaceFile">
     </action>
  </actionSet>

    This tag leads to duplicated “Open resource…” menu item. This duplication raises a conflict.
    Comment it (or remove) and start flash builder with clean option:

    FlashBUilder.exe -clean
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