I have the following code in an Main form
(DevExpress.XtraBars.Ribbon.RibbonForm)

barStatictext.Caption = "Listare centralizatorul amortizarii";
Rapoarte.CentrAmortizat lstCentrAmortiz = new
Rapoarte.CentrAmortizat("amortizat");
PrintingSystem prts = lstCentrAmortiz.PrintingSystem;
PrintableComponentLink lnk = new PrintableComponentLink(prts);
DevExpress.XtraPrinting.Preview.PrintPreviewRibbonFormEx frm = new
DevExpress.XtraPrinting.Preview.PrintPreviewRibbonFormEx();
frm.PrintingSystem = prts;
lstCentrAmortiz.lblTitlu.Text = "Centralizatorul amortizarii";
lstCentrAmortiz.CreateDocument();
frm.Text = "Centralizatorul amortizarii";
frm.Show();

Everything works fin except when I minimize this form, then restore it and
close it from ribbon form's Close Print Preview button (not forms close
button) I get an unhandled exception at main program on
Application.Run(new Main());
"Object reference not set to an instance of an object"

Hello Sorin,

I recommend that you register a bug report in our Support Center at http://www.devexpress.com/Support/Center/CreateIssue.aspx?issuetype=BugReport, and attach your test project to it, so that we can investigate it. This would be greatly appreciated!