I changed the location of my machine to "United Kingdom" and the Format to "English (United Kingdom)".
I created a simple Windows Form with a single UltraDateTimeEditor and I receive and unhandled exception when clicking the drop down button. The beginning of the stack trace is below.
Is this a known bug? I made no property changes to the control. I am running Windows 7 32-bit and NetAdvantage v9.1.
System.FormatException: String was not recognized as a valid DateTime. at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles) at System.Convert.ToDateTime(String value, IFormatProvider provider) at Infragistics.Win.UltraWinMaskedEdit.EditInfo.MaxValueForMask(Object maxValue, String mask)
I think this might be a known bug with UltraDateTimeEditor which was fixed a long time ago. You should get the latest service release and that should correct the issue:
How to get the latest service release - Infragistics Community