YuAndDan,
That would be a mistake, but not a significant mistake. The question asks for the visa applicant's A#, the visa applicant has an A# as a result of a visa petition having been filed for them, the A# should be provided. A#s are not attached to entries to the USA, they are attached to USCIS case files.
No big deal if it's not provided, however. The consulate has the approved petition and file, so they know the A# and will fill it in themselves.
(Might be a big deal if there had been any previous cases with unsavory aspects attached to them, however, and the A# was not provided but the link was otherwise uncovered.)
Yodrak
QUOTE(YuAndDan @ Dec 25 2006, 10:52 AM)

We put never, and did not put the A# on the form since the lines are referring to prior visit cases, not the current one.