Excel Importer not working after upgrade from 9.24 to 10.12.9

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Hi,   I recently upgraded my mendix modeler from 9.24 to 10.12 and my excel importer stopped working. getting below log.   java.lang.NoSuchMethodError: 'byte[] org.apache.commons.io.IOUtils.byteArray(int)'    at org.apache.commons.io.output.AbstractByteArrayOutputStream.needNewBuffer(AbstractByteArrayOutputStream.java:140)    at org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream.<init>(UnsynchronizedByteArrayOutputStream.java:166)    at org.apache.commons.io.output.UnsynchronizedByteArrayOutputStream$Builder.get(UnsynchronizedByteArrayOutputStream.java:82)    at org.apache.poi.util.IOUtils.peekFirstNBytes(IOUtils.java:144)    at org.apache.poi.poifs.filesystem.FileMagic.valueOf(FileMagic.java:209)    at org.apache.poi.openxml4j.opc.internal.ZipHelper.verifyZipHeader(ZipHelper.java:145)    at org.apache.poi.openxml4j.opc.internal.ZipHelper.openZipFile(ZipHelper.java:217)    at org.apache.poi.openxml4j.opc.ZipPackage.<init>(ZipPackage.java:188)    at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:285)    at org.apache.poi.openxml4j.opc.OPCPackage.open(OPCPackage.java:192)    at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:336)    at excelimporter.reader.readers.ExcelXLSXDataReader$1.<init>(ExcelXLSXDataReader.java:51)    at excelimporter.reader.readers.ExcelXLSXDataReader.parseExcelFile(ExcelXLSXDataReader.java:51)    at excelimporter.reader.readers.ExcelXLSXDataReader.readDataRows(ExcelXLSXDataReader.java:45)    at excelimporter.reader.readers.ExcelReader.importData(ExcelReader.java:364)    at excelimporter.reader.ExcelImporter.startImport(ExcelImporter.java:118)    at excelimporter.actions.StartImportByTemplate.executeAction(StartImportByTemplate.java:61)    at excelimporter.actions.StartImportByTemplate.executeAction(StartImportByTemplate.java:25)    at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48)    at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57)    at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeSync$2(ActionManager.scala:105)    at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)    at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:104)    at com.mendix.basis.actionmanagement.UserActionCallBuilderImpl.execute(UserActionCallBuilderImpl.scala:59)    at com.mendix.modules.microflowengine.actions.actioncall.ForegroundJavaAction.doExecute(ForegroundJavaAction.scala:35)    at com.mendix.modules.microflowengine.actions.actioncall.ForegroundJavaAction.doExecute(ForegroundJavaAction.scala:11)    at com.mendix.modules.microflowengine.actions.actioncall.JavaAction.execute(JavaAction.scala:38)    at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.$anonfun$execute$1(MicroflowObject.scala:29)    at scala.Option.flatMap(Option.scala:283)    at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.scala:26)    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:177)    at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:116)    at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48)    at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.$anonfun$runMonitoredAction$1(CoreActionHandlerImpl.scala:59)    at com.mendix.basis.actionmanagement.ActionMonitoring$.$anonfun$monitor$1(ActionMonitoring.scala:52)    at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20)    at com.mendix.basis.actionmanagement.ActionMonitoring$.monitor(ActionMonitoring.scala:52)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.runMonitoredAction(CoreActionHandlerImpl.scala:59)    at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:46)    at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57)    at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeAsync$3(ActionManager.scala:88)    at scala.concurrent.Future$.$anonfun$apply$1(Future.scala:687)    at scala.concurrent.impl.Promise$Transformation.run(Promise.scala:467)    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)    at java.base/java.lang.Thread.run(Thread.java:829)   Help would be much appreciated.   Thanks
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1 answers
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Check your lib directory for duplicate jar files specifically apache.commons.io.

Additionally open your project in eclipse to see where the issue is and what dependency is missing or incorrect.

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