System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

if  more than 65535 files in your temp folder, this error can occurs, 

To resolve this, remove all temporary files in C:/Windows/Temp.

Error:

2019-05-05 00:09:32,333 ERROR MonitoringLogger- PrintReport:- PrintWebReport() System.IO.IOException: The file exists.

   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

   at System.IO.Path.InternalGetTempFileName(Boolean checkHost)

   at CrystalDecisions.ReportSource.EromReportSourceBase.ExportToStream(ExportRequestContext reqContext)

   at CrystalDecisions.CrystalReports.Engine.FormatEngine.ExportToStream(ExportRequestContext reqContext)

   at CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToStream(ExportOptions options)

   at CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToHttpResponse(ExportOptions options, HttpResponse response, Boolean asAttachment, String attachmentName)

   at CrystalDecisions.CrystalReports.Engine.ReportDocument.ExportToHttpResponse(ExportFormatType formatType, HttpResponse response, Boolean asAttachment, String attachmentName)

   at SFAWebAdmin.WebPages.PrintReport.PrintWebReport(ReportDocument Report)