The DG is trying to set up an item editor, but there doesn't seem to be a
first row any more. Not sure how you got into that situation.
You can always override updateDisplayList and catch the error, but probably
better to figure why you're in this situation.
flex harUI im not sure either thats my problem?... do you have any suggestion as
how i should go about debugging this? I'm litterally hiding one grid and then showing another?... I dont understand
what could be causing the problem. Can you offer any advice? would a better tecnique be to completely remove the first grid and then add the second grid and vice versa?
Hope to hear back.
The stack trace points to a line of code and how we got there. The stack
trace says that the DG is trying to set up an item editor and can't find the
first row. It could be the one being hidden or the one being shown. The
debugger should be able to help you figure that out.
The debugger will stop on that error and you should be able to determine
which datagrid and why it is trying to set up an editor and whether its
dataprovider is what you think it should be.