I have an random 'Parameter is not valid' Exception in the Toolbar/Ribbon which is not reproduceable for me... The Stacktrace leads from the Ribbon into the FormattedLinkLabel and then into the System.Drawing.Graphics Napespace...
It seems to be the same Problem like reported in here:
http://community.infragistics.com/forums/t/41053.aspx
any ideas?
We've managed to reproduce the error we're seeing in one of the Infragistics samples. On a Vista machine, if you run the "IGProject-UltraGanttView with Office 2010 Style Ribbon" sample from the samples explorer -> Maximise the applciation -> Click the notes tool - displaying a dialog -> Close the dialog -> Restore the application (un-maximise it), the error occurs (every-time!).
The error witnessed here produces the exact same stack trace.
We'll hopefully get round to contacting Infragistics support regarding this, but here's an informal notification of the bug.
As far as a workaround goes, you can try switching off the glass affect for the toolbar by setting the MyUltraToolbarsManager.IsGlassSupported property to false. The error we're witnessing doesn't appear to occur if we set this accordingly. I'm unsure if that will work in your case however, as it seems you have a slightly different variation if it's reproducable on Windows 7 machines.
Richard
Thanks for your explanations