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java.lang.NullPointerException: null	at com.databasepreservation.modules.siard.in.read.ZipAndFolderReadStrategy.createInputStream(ZipAndFolderReadStrategy.java:36)	at com.databasepreservation.modules.siard.in.content.SIARD2ContentImportStrategy.startElement(SIARD2ContentImportStrategy.java:234)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.emptyElement(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)	at com.databasepreservation.modules.siard.in.content.SIARD2ContentImportStrategy.importContent(SIARD2ContentImportStrategy.java:141)	at com.databasepreservation.modules.siard.in.input.SIARDImportDefault.getDatabase(SIARDImportDefault.java:45)	at com.databasepreservation.Main.run(Main.java:126)	at com.databasepreservation.Main.internal_main(Main.java:80)	at com.databasepreservation.Main.main(Main.java:62)