Error loading platform:/resource/MicrosoftOfficeExcelInjector/modelsExamples/ExcelXMLFileExample.xml: org.eclipse.emf.ecore.xmi.PackageNotFoundException: Package with uri 'urn:schemas-microsoft-com:office:spreadsheet' not found. (platform:/resource/MicrosoftOfficeExcelInjector/modelsExamples/ExcelXMLFileExample.xml, 3, 120)