mksh: Fatal error: Cannot load command `./drawHouses.sh': Bad file number
> chmod u+x ./drawHouses.shThe
drawHouses.sh should be replaced with whatever shell script is giving you trouble. The problem arises because the shell script must have the "execute" bit set in the file permissions in order to be an executable shell script.
Similarly, the links to the next and prev students should be to those students CISC181 pages, not their personal pages. Many students still DON'T have this correct, and it will result in those students losing points.