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java.util.zip.ZipException: Not in GZIP format	at java.util.zip.GZIPInputStream.readHeader(Unknown Source)	at java.util.zip.GZIPInputStream.(Unknown Source)	at java.util.zip.GZIPInputStream.(Unknown Source)	at com.application.areca.metadata.AbstractMetadataAdapter.buildInputStream(AbstractMetadataAdapter.java:190)	at com.application.areca.metadata.AbstractMetadataAdapter.getMetaData(AbstractMetadataAdapter.java:201)	at com.application.areca.metadata.content.ArchiveContentAdapter.getIterator(ArchiveContentAdapter.java:169)	at com.application.areca.metadata.content.ArchiveContentAdapter.buildIterator(ArchiveContentAdapter.java:183)	at com.application.areca.metadata.content.ArchiveContentManager.buildIteratorForArchive(ArchiveContentManager.java:67)	at com.application.areca.impl.AbstractIncrementalFileSystemMedium.checkRecoveredFiles(AbstractIncrementalFileSystemMedium.java:1999)	at com.application.areca.impl.AbstractIncrementalFileSystemMedium.recoverImpl(AbstractIncrementalFileSystemMedium.java:1840)	at com.application.areca.impl.AbstractIncrementalFileSystemMedium.recover(AbstractIncrementalFileSystemMedium.java:1913)	at com.application.areca.impl.AbstractIncrementalFileSystemMedium.checkArchives(AbstractIncrementalFileSystemMedium.java:377)	at com.application.areca.impl.FileSystemTarget.processArchiveCheck(FileSystemTarget.java:283)	at com.application.areca.AbstractTarget.processBackup(AbstractTarget.java:437)	at com.application.areca.ActionProxy.processBackupOnTarget(ActionProxy.java:98)	at com.application.areca.launcher.tui.Launcher$1.run(Launcher.java:405)	at java.lang.Thread.run(Unknown Source)