java.lang.NullPointerException

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    • java.lang.NullPointerException: null at org.apache.metamodel.excel.ExcelUpdateCallback.getLastRowNum(ExcelUpdateCallback.java:131)[MetaModel-excel-4.5.2.jar:4.5.2] at org.apache.metamodel.excel.ExcelUpdateCallback.createRow(ExcelUpdateCallback.java:125)[MetaModel-excel-4.5.2.jar:4.5.2] at org.apache.metamodel.excel.ExcelInsertBuilder.execute(ExcelInsertBuilder.java:52)[MetaModel-excel-4.5.2.jar:4.5.2] at org.datacleaner.output.AbstractMetaModelOutputWriter$1.run(AbstractMetaModelOutputWriter.java:94)[DataCleaner-engine-core-5.0.3.jar:na] at org.apache.metamodel.excel.ExcelDataContext.executeUpdate(ExcelDataContext.java:232)[MetaModel-excel-4.5.2.jar:4.5.2] at org.datacleaner.output.AbstractMetaModelOutputWriter.flushBuffer(AbstractMetaModelOutputWriter.java:85)[DataCleaner-engine-core-5.0.3.jar:na] at org.datacleaner.output.AbstractMetaModelOutputWriter.close(AbstractMetaModelOutputWriter.java:105)[DataCleaner-engine-core-5.0.3.jar:na] at org.datacleaner.extension.output.AbstractOutputWriterAnalyzer.getResult(AbstractOutputWriterAnalyzer.java:75)[DataCleaner-writers-5.0.3.jar:na] at org.datacleaner.extension.output.AbstractOutputWriterAnalyzer.getResult(AbstractOutputWriterAnalyzer.java:38)[DataCleaner-writers-5.0.3.jar:na] at org.datacleaner.job.tasks.CollectResultsTask.execute(CollectResultsTask.java:60)[DataCleaner-engine-core-5.0.3.jar:na] at org.datacleaner.job.concurrent.TaskRunnable.run(TaskRunnable.java:61)[DataCleaner-api-5.0.3.jar:na] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)[na:1.8.0_101] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)[na:1.8.0_101] at java.lang.Thread.run(Unknown Source)[na:1.8.0_101]
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