Hi everyone; I recently updated my app to mendix 10.2 from 9.24, and now the excel imported has just stopped working. This is the error output i get: java.lang.NoSuchFieldError: Factory at org.apache.poi.xssf.usermodel.XSSFRichTextString.<init>(XSSFRichTextString.java:89) at excelimporter.reader.readers.ExcelDataReader.evaluateCellData(ExcelDataReader.java:105) at excelimporter.reader.readers.ExcelDataReader.lambda$readRow$1(ExcelDataReader.java:62) at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at excelimporter.reader.readers.ExcelDataReader.readRow(ExcelDataReader.java:52) at excelimporter.reader.readers.ExcelDataReader.lambda$readData$0(ExcelDataReader.java:28) at java.base/java.util.TreeMap$ValueSpliterator.forEachRemaining(TreeMap.java:2890) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at excelimporter.reader.readers.ExcelDataReader.readData(ExcelDataReader.java:25) at excelimporter.reader.readers.ExcelReader.importData(ExcelReader.java:357) at excelimporter.reader.ExcelImporter.startImport(ExcelImporter.java:118) at excelimporter.actions.StartImportByTemplate.executeAction(StartImportByTemplate.java:61) at excelimporter.actions.StartImportByTemplate.executeAction(StartImportByTemplate.java:25) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48) at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57) at com.mendix.basis.actionmanagement.ActionManager.$anonfun$executeSync$2(ActionManager.scala:104) at com.mendix.util.classloading.Runner$.withContextClassLoader(Runner.scala:20) at com.mendix.basis.actionmanagement.ActionManager.executeSync(ActionManager.scala:103) at com.mendix.basis.actionmanagement.UserActionCallBuilderImpl.execute(UserActionCallBuilderImpl.scala:57) 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$1(MicroflowObject.scala:32) at scala.Option.flatMap(Option.scala:283) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.scala:29) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.scala:176) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.scala:116) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:58) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.doCall(CoreActionHandlerImpl.scala:71) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.call(CoreActionHandlerImpl.scala:48) at com.mendix.core.actionmanagement.internal.InternalCoreAction.call(InternalCoreAction.java:57) at com.mendix.basis.actionmanagement.CoreActionHandlerImpl.$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$3(ActionManager.scala:87) at scala.concurrent.Future$.$anonfun$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:834) I’m using the latest version (10.4.0). I’ve tried to downgrade to the 10.3.0 which is the last one i can downgrade, older versions are not compatible anymore. I’ve also tried to clean up some jar files but I always get this error. Any suggestions?