Error: PrintStartReport

When a ‘print’ button is pressed, an error message pops up as shown below:

 

Code under the procedure as shown:

 

PR_Verify_PDF_Printer;

PrintStartReport(sp_WeeklyReport_Cover_Title);

! Print cover
PrintPage("r::Weekly Report Cover");

! Print summary
PrintPage("r::Weekly Report Summary");

for i_WeeklyReport_PrintableMonth do

    ! Set month
    ep_WeeklyReport_Month := i_WeeklyReport_PrintableMonth;

    ! Generate report
    pr_WeeklyReport_GenerateReport;

    for i_Report_PrintableAffiliate do

        ! Set affiliate
        ep_WeeklyReport_Affiliate := i_Report_PrintableAffiliate;

        ! Generate Affiliate report
        pr_WeeklyReport_GenerateAffiliateReport;

        ! Print page
        PrintPage("r::Weekly Report");

        if p_WeeklyReport_PrintExtraGraphs then
            ! Print page 2
            PrintPage("r::Weekly Report 2");
        endif;

    endfor;

    ! Print monthly totals page
    PrintPage("r::Weekly Report Month Total");

    pr_WeeklyReport_ClearTotals;

endfor;

PrintEndReport();
 

What might be causing it? How does one resolve this issue?