Rowset position cannot be restarted

Hi,

I have two Datasets (AdoQuery) connected as Master-Details.
The error "Rowset position cannot be restarted" appears
when I am trying to iterate through Child dataset records using code below.

While not AdoQueryChild.Eof do
begin
ReadingRecordsValues.....;
AdoQUeryChild.Next;
end;

This happens on MSSQL, CursorLocation and CursorType for both DataSets are
set
to clUseServer and ctKeyset.

Thanks for help
M.


.