I am coming across a weird issue. I have attached project samples out of which one is using Infragistics V7.3 while other is using V12.1. I am opening a form from new thread and coming across a red cross while selecting date time column only from column chooser. No other type of column is creating such issue. Moreover, this is not happening with V12.1.

private void ClickMe_Click(object sender, EventArgs e)
{
Thread thread = new Thread(new ThreadStart(LoadPersonInfoOnNewThread));
thread.SetApartmentState(ApartmentState.STA);
thread.IsBackground = true;
thread.Start();

}

private void LoadPersonInfoOnNewThread()
{
try
{
PersonInfo pInfo = new PersonInfo();

DataTable dt = new DataTable();
dt.Columns.Add("FirstName", typeof(string));
dt.Columns.Add("DOB", typeof(DateTime));
dt.Columns.Add("LastName", typeof(string));

DataRow row = dt.NewRow();
row["FirstName"] = "Rahul";
row["LastName"] = "Gupta";
row["DOB"] = DateTime.Now;
dt.Rows.Add(row);

pInfo.grdPersonInfo.DataSource = dt;

Application.Run(pInfo);

}

catch (Exception ex)
{

MessageBox.Show(ex.Message);
}

}

NullReferenceException encountered at Infragistics.Win.UltraWinMaskedEdit.MaskInfo.IsMaskModeDefined(MaskMode mode). Please update ASAP as one of very critical clients is facing this issue. 

Note: On clicking the button,we are launching the new form on a differenet thread and all the updates to the gird are done on that thread as I totally understand that any updates to the grid should only be made on the main UI thread. Also in our production code we have launched some of the forms on a diff GUI thread to improve the performance(hangs) which we were earlier seeing. We have tested on WindowsXP, Windows7 and Windows 2008 Server R2.

Steps to reproduce :

1. Click on “Click Me” button on Main Form and it will open a Person Info form.
2. Select/deselect date time column from column chooser.
3. Close the form.
4. Repeat steps 1 and 2.