c# - Set subreport text object in Crystal Reports -

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I wanted to set the subreport headers text through the resource file. I have tried this code below 

  report document rDocument = (report document) session ["report source"]; (TextObject) rDocument.Subreports ["HollidayShub Report"]. ReportDefinion.ReportsObjects ["Hollidaystriulle"]). Text = resource Resources. HoliseDual;   
 But here I am getting the error because  is not set for example object reference object   
 How do I solve this issue I can. Appreciate any help.  
 
 
  text object txtpentotal = (TextObject) objRpt.Subreports ["Subreport.rpt"]. ReportDefinition .Sections ["Section4"] ReportObjects ["txttotal"]. Txtpentotal.Text = Pen. Text;

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