Override Header fails badly and should faily gracefully.

[ftrotter]

I have a two level report. At the top level there are like 2 columns.
In the drill down, which is detected and facilitated by the value of GetCode() being set...
I have like 10 columns...

When I setup the OverrideHeader function to make the drill down level work correctly (by hiding several "working" columns, like URLs, etc etc..) then when I go to the higher level report there is an error saying "this column is missing".

The column is "missing" in that level of the report and so it does not need to be "hidden" in that level of the report. The same is true for the others.. if I want to have something BOLD when it shows up ina report, it should not crash if that column is missing from one permutation of the report.