jxl读取设置过数据有效性的xls文件报错

//在用jxl读入excel时，一直报如下错误：
Warning:  Cannot read drop down range Unrecognized token 43
Exception in thread "main" java.lang.NullPointerExceptionat jxl.biff.DataValiditySettingsRecord.getFirstColumn(DataValiditySettingsRecord.java:237)at jxl.read.biff.SheetReader.read(SheetReader.java:1016)at jxl.read.biff.SheetImpl.readSheet(SheetImpl.java:686)at jxl.read.biff.SheetImpl.getRows(SheetImpl.java:441)at excel.ExcelUtils.readExcel(ExcelUtils.java:48)at excel.ExcelUtils.main(ExcelUtils.java:220)
//去掉excel的数据有效性验证就可以了，如下所示代码：
//构造Workbook（工作薄）对象
File file =new File(jcsjdrModel.getJcsjfilePath());
WorkbookSettings ws = new WorkbookSettings();
ws.setCellValidationDisabled(true);
wb=Workbook.getWorkbook(file,ws);