# Importing Tags java.lang.ClassNotFoundException: boolean

**URL:** <https://forum.inductiveautomation.com/t/importing-tags-java-lang-classnotfoundexception-boolean/31622>\
**Category:** Ignition\
**Created:** [January 25, 2020, 12:14am UTC](https://forum.inductiveautomation.com/t/importing-tags-java-lang-classnotfoundexception-boolean/31622 "2020-01-25T00:14:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![maygun](https://avatars.discourse-cdn.com/v4/letter/m/6f9a4e/32.png) [@maygun](https://forum.inductiveautomation.com/u/maygun)\
**Post date:** [January 25, 2020, 12:14am UTC](https://forum.inductiveautomation.com/t/importing-tags-java-lang-classnotfoundexception-boolean/31622/1 "2020-01-25T00:14:42Z")

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Hi,

I have exported tags from a project on our dev server and tried to import it into a project on my local  
machine, and the import fails with the following error message. Has anyone come across such issues before?

org.xml.sax.SAXException: boolean  
java.lang.ClassNotFoundException: boolean  
at com.inductiveautomation.ignition.common.xmlserialization.simple.SimpleXMLReader.startElement(SimpleXMLReader.java:197)  
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.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)  
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)  
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(Unknown Source)  
at com.inductiveautomation.ignition.common.xmlserialization.simple.SimpleXMLReader.parseStream(SimpleXMLReader.java:101)  
at com.inductiveautomation.ignition.common.xmlserialization.simple.SimpleXMLReader.parseFile(SimpleXMLReader.java:65)  
at com.inductiveautomation.ignition.common.sqltags.importexport.TagXMLImporter.runImport(TagXMLImporter.java:83)  
at com.inductiveautomation.ignition.designer.sqltags.action.ImportTagAction$TagImportTask.run(ImportTagAction.java:135)  
at com.inductiveautomation.ignition.client.util.gui.progress.ClientProgressManager$ClientRunningTask.run(ClientProgressManager.java:495)  
at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:518)  
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)  
at java.util.concurrent.FutureTask.run(Unknown Source)  
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(Unknown Source)  
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
at java.lang.Thread.run(Unknown Source)  
Caused by: java.lang.ClassNotFoundException: boolean  
at java.net.URLClassLoader.findClass(Unknown Source)  
at java.lang.ClassLoader.loadClass(Unknown Source)  
at java.lang.ClassLoader.loadClass(Unknown Source)  
at java.lang.Class.forName0(Native Method)  
at java.lang.Class.forName(Unknown Source)  
at com.inductiveautomation.ignition.common.sqltags.importexport.DatasetElement$ColumnElement.setAttributes(DatasetElement.java:127)  
at com.inductiveautomation.ignition.common.xmlserialization.simple.SimpleXMLReader.startElement(SimpleXMLReader.java:190)  
… 25 more

Ignition v7.9.10 (b2018112821)  
Java: Oracle Corporation 1.8.0\_221

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [January 25, 2020, 12:45am UTC](https://forum.inductiveautomation.com/t/importing-tags-java-lang-classnotfoundexception-boolean/31622/2 "2020-01-25T00:45:37Z")

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This sounds like what can happen when going backwards in Ignition versions. That is not (cannot be) supported.