FastReport发布到IIS服务器多人访问时就报这个错，人少访问不报错

Question

FastReport发布到IIS服务器多人访问时就报这个错，人少访问不报错
ERROR: (Text39): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text40): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text41): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text42): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text43): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text44): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text45): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text46): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text47): Error CS0103: The name 'pRptHawb' does not exist in the current context (Text48): Error CS0103: The name at FastReport.Code.AssemblyDescriptor.InternalCompile() at FastReport.Code.AssemblyDescriptor.Compile() at FastReport.Report.Compile() at FastReport.Report.PreparePhase1() at FastReport.Web.Handlers.WebExport.ReportPrepare() at FastReport.Web.Handlers.WebExport.GetReportHTML(StringBuilder sb, WebReport webReport, HttpContext context) at FastReport.Web.Handlers.WebExport.SendReport(HttpContext context)