LunchMultipleReports.cs

PXReportRequiredException ex = null;

if(row.ARRefNumber != null)
{
  Dictionary<string, string> dictionary = new Dictionary<string, string>();
  dictionary["DocType"] = row.ARDocType;
  dictionary["RefNbr"] = row.ARRefNumber;

  ex = PXReportRequiredException.CombineReport(ex, row.ARBatchNumber == null ? "AR610500" : "AR622000", dictionary, false);
}
if (row.APRefNumber != null)
{
  APInvoice inv = PXSelectorAttribute.Select<DocHeader.aPRefNumber>(Document.Cache, row) as APInvoice;

  Dictionary<string, string> dictionary = new Dictionary<string, string>();
  dictionary["DocType"] = row.APDocType;
  dictionary["RefNbr"] = row.APRefNumber;
  dictionary["PeriodTo"] = PX.Objects.GL.OpenPeriodAttribute.FormatForDisplay(inv.FinPeriodID);
  dictionary["PeriodFrom"] = PX.Objects.GL.OpenPeriodAttribute.FormatForDisplay(inv.FinPeriodID);

  ex = PXReportRequiredException.CombineReport(ex, row.APBatchNumber == null ? "AP610500" : "AP622000", dictionary, false);
}

if (ex != null)
{
  ex.Mode = PXBaseRedirectException.WindowMode.New;
  ex.SeparateWindows = true;
  throw ex;
}