Hi Dan,
Rather than changing the result, as Keith described, fix the cause. I've been harping on Adesk to fix this for quite some time, but it is STILL in the 2008 verticals.
This comes from the old "Express Tools", as you noted. The "where" is near the end of the Civil.mnl file.....it's about the fourth from last function defined....select the entire function and either delete it or comment it out.
Never will cause another problem...until a SP or newer version comes along.