You have given very small information about your problem :-(
It looks that you are trying to scp a directory...
there are two options for you.
1) scp a single file, as in your example:
scp firstname.lastname@example.org:/home/student/aerofoils/dumpfile dumpfile
2) scp the whole directory using -r (recurse) option, but, in this case, target must be a directory (e.g. "." for current dir)!
scp -r email@example.com:/home/student/aerofoils/ .
hope I could help.