org.dbunit.dataset.NoSuchColumnException: ACT_HI_TASKINST.ID_

[Sfaecp]

DataBase:oracle11g ID_:nvarchar2. if I use varchar2(ID_) , I won't have this problem.
detail:
org.dbunit.dataset.NoSuchColumnException: ACT_HI_TASKINST.ID_ - (Non-uppercase input column: id_) in ColumnNameToIndexes cache map. Note that the map's column names are NOT case sensitive.
at org.dbunit.dataset.AbstractTableMetaData.getColumnIndex(AbstractTableMetaData.java:117)
at org.dbunit.operation.AbstractOperation.getOperationMetaData(AbstractOperation.java:89)
at org.dbunit.operation.RefreshOperation.execute(RefreshOperation.java:101)
at com.github.springtestdbunit.DbUnitRunner.setupOrTeardown(DbUnitRunner.java:183)
at com.github.springtestdbunit.DbUnitRunner.beforeTestMethod(DbUnitRunner.java:75)
at com.github.springtestdbunit.DbUnitTestExecutionListener.beforeTestMethod(DbUnitTestExecutionListener.java:185)
at com.github.springtestdbunit.TestExecutionListenerChain$3.call(TestExecutionListenerChain.java:94)
at com.github.springtestdbunit.TestExecutionListenerChain.runChain(TestExecutionListenerChain.java:127)
at com.github.springtestdbunit.TestExecutionListenerChain.forwards(TestExecutionListenerChain.java:116)
at com.github.springtestdbunit.TestExecutionListenerChain.beforeTestMethod(TestExecutionListenerChain.java:92)
at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:291)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)