Good to know.
a possibly simple fix would be to copy the jar/jad to a temp jar/jad and 
let the emulator use those.
question asked: when will the temp files be cleaned up? you will 
probably need to do it when the emulator is closed.

Craig Setera wrote:
> This is a known issue at this point.  It is definitely on my radar to 
> get this fixed.
>
> Heiko Selber wrote:
>   
>> Omry Yadan wrote:
>>
>>   
>>     
>>> I believe I found the cause of the exception:
>>>
>>> when the emulator is open, and I make any change in the code, eclipseme 
>>> tries to reconstruct the jar+jad, which are used by the emulator 
>>> (Windows) and it fails with this error.
>>>
>>> this is a serious usability problem for newer versions of eclipseme.
>>>     
>>>       
>>   
>>     
>>>>> org.eclipse.core.runtime.CoreException: Illegal Manifest Entry Key or 
>>>>> Value "E:\dev\workspace\project\.eclipseme.tmp\emulation\Midlet.jar (The 
>>>>> system cannot find the path specified)"
>>>>>         
>>>>>           
>> I have the same problem here (Eclipse 3.3, EclipseME 1.7.6). In fact the 
>> exception is slightly different:
>>
>> Illegal Manifest Entry Key or Value 
>> "de.schlichtherle.io.ArchiveFileSystem$ArchiveReadOnlyException: Archive 
>> file is read-only!"
>>
>> In addition (and maybe related), I get a similar exception every *other* 
>> time I invoke J2ME -> Create Package. I.e. it fails after a fresh build, the 
>> second time works, the third time fails again, the fourth time works etc.
>>
>> Here is the error log:
>>
>> !ENTRY eclipseme.core 4 0 2007-10-31 11:08:34.776
>> !MESSAGE createPackageForProject
>> !STACK 1
>> org.eclipse.core.internal.resources.ResourceException: Problems encountered 
>> while deleting resources.
>>      at 
>> org.eclipse.core.internal.resources.Resource.delete(Resource.java:713)
>>      at 
>> org.eclipse.core.internal.resources.Resource.delete(Resource.java:672)
>>      at 
>> eclipseme.core.internal.preverification.builder.PreverificationBuilder.deleteRuntimeJar(PreverificationBuilder.java:215)
>>      at 
>> eclipseme.core.internal.preverification.builder.PreverificationBuilder.cleanProject(PreverificationBuilder.java:132)
>>      at 
>> eclipseme.core.model.impl.MidletSuiteProject.createPackage(MidletSuiteProject.java:230)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.createPackageForProject(AbstractCreatePackageAction.java:96)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.access$0(AbstractCreatePackageAction.java:89)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction$1.run(AbstractCreatePackageAction.java:132)
>>      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
>>      at org.eclipse.core.runtime.Platform.run(Platform.java:857)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.doPackageCreation(AbstractCreatePackageAction.java:130)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.run(AbstractCreatePackageAction.java:67)
>>      at 
>> org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:256)
>>      at 
>> org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:546)
>>      at 
>> org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)
>>      at 
>> org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)
>>      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
>>      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
>>      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
>>      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
>>      at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
>>      at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
>>      at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
>>      at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
>>      at 
>> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
>>      at 
>> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
>>      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
>>      at 
>> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
>>      at 
>> org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)
>>      at 
>> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
>>      at 
>> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
>>      at 
>> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
>>      at 
>> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
>>      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:508)
>>      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
>>      at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
>> !SUBENTRY 1 org.eclipse.core.resources 4 273 2007-10-31 11:08:34.776
>> !MESSAGE Problems encountered while deleting resources.
>> !SUBENTRY 2 org.eclipse.core.resources 4 273 2007-10-31 11:08:34.776
>> !MESSAGE Could not delete 
>> 'D:\Java\eclipse\MIDlet-workspace\MyMidlet\.eclipseme.tmp\emulation\MyMidlet.jar'.
>> !STACK 1
>> org.eclipse.core.runtime.CoreException: Problems encountered while deleting 
>> files.
>>      at 
>> org.eclipse.core.internal.filesystem.local.LocalFile.delete(LocalFile.java:107)
>>      at 
>> org.eclipse.core.internal.resources.ResourceTree.internalDeleteFile(ResourceTree.java:303)
>>      at 
>> org.eclipse.core.internal.resources.ResourceTree.standardDeleteFile(ResourceTree.java:769)
>>      at 
>> org.eclipse.core.internal.resources.Resource.unprotectedDelete(Resource.java:1655)
>>      at 
>> org.eclipse.core.internal.resources.Resource.delete(Resource.java:700)
>>      at 
>> org.eclipse.core.internal.resources.Resource.delete(Resource.java:672)
>>      at 
>> eclipseme.core.internal.preverification.builder.PreverificationBuilder.deleteRuntimeJar(PreverificationBuilder.java:215)
>>      at 
>> eclipseme.core.internal.preverification.builder.PreverificationBuilder.cleanProject(PreverificationBuilder.java:132)
>>      at 
>> eclipseme.core.model.impl.MidletSuiteProject.createPackage(MidletSuiteProject.java:230)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.createPackageForProject(AbstractCreatePackageAction.java:96)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.access$0(AbstractCreatePackageAction.java:89)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction$1.run(AbstractCreatePackageAction.java:132)
>>      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
>>      at org.eclipse.core.runtime.Platform.run(Platform.java:857)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.doPackageCreation(AbstractCreatePackageAction.java:130)
>>      at 
>> eclipseme.ui.internal.actions.AbstractCreatePackageAction.run(AbstractCreatePackageAction.java:67)
>>      at 
>> org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:256)
>>      at 
>> org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:546)
>>      at 
>> org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)
>>      at 
>> org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)
>>      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
>>      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
>>      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
>>      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
>>      at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389)
>>      at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353)
>>      at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219)
>>      at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
>>      at 
>> org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
>>      at 
>> org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
>>      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
>>      at 
>> org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106)
>>      at 
>> org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:169)
>>      at 
>> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
>>      at 
>> org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
>>      at 
>> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
>>      at 
>> org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
>>      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:508)
>>      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:447)
>>      at org.eclipse.equinox.launcher.Main.run(Main.java:1173)
>> !SUBENTRY 3 org.eclipse.core.filesystem 4 273 2007-10-31 11:08:34.776
>> !MESSAGE Problems encountered while deleting files.
>> !SUBENTRY 4 org.eclipse.core.filesystem 4 273 2007-10-31 11:08:34.776
>> !MESSAGE Could not delete: 
>> D:\Java\eclipse\MIDlet-workspace\MyMidlet\.eclipseme.tmp\emulation\MyMidlet.jar.
>>
>>   
>>     
>
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