Grouping problem

[Felix]

I have a simple GridView
One of the columns is:

<telerikGrid:GridViewDataColumn 
	Header="TDM Node" 
	UniqueName="L1Type" 
	DataMemberBinding="{Binding L1Type, Converter={StaticResource TDMNodeConverter}}"
	/>

Which is using a converter to convert from one set of strings to another

The problem or a bug:
After the data is successfully loaded into the GridView
I am trying to GroupBy this column and get an error

The Error is that the TDMNodeConverter can't convert the value.
So what is happening is the DataGrid trying to execute the TDMNodeConverter on already converted data

Is this a bug? Or am I doing something wrong?

Thanks!

[Felix]

any ideas?

[Yavor Georgiev]

Hello Felix,

 Please check out the message I posted to the private support thread you opened for the same problem. Thank you.

Sincerely yours,
Yavor Georgiev
the Telerik team