install - Error when Updating/Installing software in Eclipse 3.4.2 -

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I am trying to install the plug-in to update the installed software and to get a new installment 3.4.2 . Whenever I try to update / update, I get this error:

"An unexpected error occurred while preparing for the operation. Org.eclipse.core.runtime.AssertionFailedException"

< P> Description: "An error occurred while preparing for unexpected operation. Null argument:"

log file entry 

  org.eclipse.core.runtime.AssertionFailedException: null Logic: at org.eclipse core.runtime.Assert.isNotNull at org.eclipse.core.runtime.Assert.isNotNull (Assert.java:86) (Assert.java:74) org.eclipse.equinox.internal.provisional.p2 On .metadata.ProvidedCapability & Lt; Init & gt; On org.eclipse.equinox.internal.provisional.p2.metadata.MetadataFactory.createProvidedCapability (MetadataFactory.java:189) (ProvidedCapability.java:25) .io.MetadataParser on org.eclipse.equinox.internal.p2.metadata.repository $ ProvidedCapabilityHandler & Lt; Init & gt; (MetadataParser.java:483) on org.eclipse.equinox.internal.p2.metadata.repository.io.MetadataParser $ ProvidedCapabilitiesHandler.startElement (metadata Parser.java:469) at org.eclipse.equinox.internal.p2.persistence. XMLParser $ AbstractHandler.startElement (XMLParser.java:171) com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement at (unknown source) com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser. Com on empty element (unknown source) com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement (unknown source) com sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl $ FragmentContentDispatcher.dispatch (unknown source com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument) (Unknown Source) at com.sun.org. Apache.xerces.internal.parsers.XML11 configuration Configuration on prs (unknown source) com.sun.org.apache.xerces.internal.parsers.xml11 PRS (Unknown Source) com.sun.org.apache.xerces.internal Parsers.XMLParser.parse (Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse on org.eclipse.e (Unknown Source) quinox.internal.p2.metadata.repository.MetadataRepositoryIO $ Parser On the organization (MetadataRepositoryIO.java193) on .parse org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryIO.read (MetadataRepositoryIO.java:56). Org.eclipse.equinox.internal.provisional.spi.p2.metadata.repository.SimpleMetadataRepositoryFactory.load (SimpleMetadataRepositoryFactory .java) at Eclipse.equinox.internal.provisional.spi.p2.metadata.repository.SimpleMetadataRepositoryFactory.validateAndLoad (SimpleMetadataRepositoryFactory.java116) : 85) at org.eclipse.equinox.internal.p2.updatesite.metadata.UpdateSiteMetadataRepository.initializeMetadataRepository (UpdateSiteMetadataRepository.java:187) at org.eclipse.equinox.internal.p2.updatesite.metadata.UpdateSiteMetadataRepository. & Lt; Init & gt; Org.eclipse.equinox.internal.p2.updatesite.metadata.updateSiteMetadataRepositoryFactory.load (UpdateSiteMetadataRepository.java:67) on org.eclipse.equinox.internal.p2.metadata.rep at Ository.MetadataRepositoryManager. on loadRepository (MetadataRepositoryManager.java:485) on org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository (MetadataRepositoryManager.java:452) org.eclipse.equinox.internal.p2.metadata. The repository at org.eclipse.equinox.internal.p2.director.SimplePlanner.gatherAvailableInstallableUnits (SimplePlanner.java.19) on Org.eclipse.equinox.internal.p2.director.SimplePlanner Metadata Repository Manager Load repository (Metadata Repository Manager.java:435) at getProvisioningPlan org.eclipse.equinox.internal.provisional.p2.ui.operations.ProvisioningUtil.getProvisioningPlan (ProvisioningUtil.java:210) org.eclipse (SimplePlanner.java:235) At equinox.internal.provisional.p2.ui On actions.InstallAction.computeProvisioningPlan org.eclipse.equinox.internal.provisional.p2.ui.actions.InstallAction.getProvisioningPlan (InstallAction.java:80) (InstallAction.java:130) on org.eclipse.equinox.internal.provisional. P2.ui.actions.ProfileModificati onAction $ 1.run org.eclipse.jface.operation.ModalContext $ ModalContextThread.run (ProfileModificationAction.java:61) (ModalContext.java:121)

I fixed my problem by re-installing eclipse from the package. I used the same process (in my knowledge) to restore it as the first time, but this time by trying to update and install features with errors.


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