I'm having an issue when trying to export the release build of my AIR application in Flash Builder 4.5. After choosing the key to sign the package and clicking finish to complete the export, it errors saying that "Error occurred while saving the project settings: "default" build target cannot be found for the selected project." I've included the error message output to the log in the .metadata folder. Any help would be great as this is baffling to me.
!ENTRY com.adobe.flexbuilder.project 4 43 2011-05-10 15:56:11.432
!MESSAGE Failed to get build target settings: default
!STACK 0
java.lang.Exception
at com.adobe.flexbuilder.project.internal.FlexProjectCore.createErrorSta tus(FlexProjectCore.java:1009)
at com.adobe.flexbuilder.util.logging.GlobalLogImpl.log(GlobalLogImpl.ja va:66)
at com.adobe.flexbuilder.util.logging.GlobalLog.log(GlobalLog.java:52)
at com.adobe.flexbuilder.project.ui.utils.ProjectBuildPackagingUI.doAppl ySettings(ProjectBuildPackagingUI.java:754)
at com.adobe.flexbuilder.project.ui.utils.ProjectBuildPackagingUI.applyS ettings(ProjectBuildPackagingUI.java:781)
at com.adobe.flexbuilder.exportimport.releaseversion.ui.ExportReleaseVer sionBuildPackagingPageContent.saveSettings(ExportReleaseVersionBuildPa ckagingPageContent.java:131)
at com.adobe.flexbuilder.exportimport.releaseversion.ui.ExportReleaseVer sionBuildPackagingPage.saveSettings(ExportReleaseVersionBuildPackaging Page.java:84)
at com.adobe.flexbuilder.exportimport.releaseversion.ui.ExportReleaseVer sionWizard.performFinish(ExportReleaseVersionWizard.java:144)
at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java :811)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java :430)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java: 234)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at com.adobe.flexbuilder.exportimport.releaseversion.ExportReleaseVersio nAction$1.run(ExportReleaseVersionAction.java:97)
at com.adobe.flexbuilder.exportimport.releaseversion.ExportReleaseVersio nAction.run(ExportReleaseVersionAction.java:103)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:2 51)
at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginActio n.java:229)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection (ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContri butionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionC ontributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.ja va:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.jav a:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at com.adobe.flexbuilder.standalone.FlashBuilderApplication.start(FlashB uilderApplication.java:108)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandl e.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runAppli cation(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Ec lipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.ja va:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.ja va:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
Update:
I have tried what J_A_X has recommended. Unfortunately none of those work. It seems to be a problem somewhere within the project settings. We have also tried running the export release build for this project on different machines with fresh installs of flash builder, but the same error message is produced every time. We've looked through so many settings it may come down to having to create a new project and copy all the code into the new application.