IWorksheet.ShowRow(1, False) causes error

Subsequent to porting from version 2.1.0.9 to 4.2.0.37, a call to IWorksheet.ShowRow(1, False) results in the following invalid state (though no error is raised): {"Specified argument was out of the range of valid values.\r\nParameter name: FirstRow"} Stack Trace is as follows: Syncfusion.XlsIO.Implementation.RangeImpl.set_FirstRow(Int32 value)\r\n at Syncfusion.XlsIO.Implementation.ApplicationImpl.CreateRange(Object parent, Int32 firstCol, Int32 firstRow, Int32 lastCol, Int32 lastRow)\r\n at Syncfusion.XlsIO.Implementation.WorksheetImpl.get_UsedRange()\r\n at Syncfusion.XlsIO.Implementation.WorksheetImpl.get_Range()\r\n at Corbis.CorbisOne.UI.Pricing.ExcelRWHelper.CreateWorkSheet(IWorksheet worksheet, Guid productTemplateUID, Boolean allowImport) in C:\\TFS\\CorbisTwo\\6.4_Dev\\Client Apps\\Pricing\\PricingTool\\ExcelRWHelper.cs:line 800"

Hi Larry, Sorry for the delay in responding to you. I was able to reproduce the problem and this has been identified as a bug. I have filed a bug report regarding this issue. Please track the status of this issue through the following link. http://www.syncfusion.com/support/issues/xlsio/Default.aspx?ToDo=view&questId=2230 We will try to fix it as soon as possible. Please let me know if you have any other queries. Thanks, Bharath.