I've replicated this in the infragistics sample> xamGrid> display>conditional formatting rules by adding
<ig:XamGrid.GroupBySettings><ig:GroupBySettings AllowGroupByArea="Top" IsGroupable="True" /></ig:XamGrid.GroupBySettings>
Then group by any column expand a group and try to ungroup.
An exception is thrown
Is there any way around it?
Which version of the tools are you using? I tested this in 19.1 with our Conditional Formatting Rules sample and everything works as expected.
we have the 2018.2 but the samples I have downloaded is "19.1.20191.84".
Just to make it clear have you had the group expanded and the conditionalcolumn visisble?