It reminds me of a similar 'goose', lets call him "notwaxing_gibbousinanyway", who on his one and only attempt at long-exposure AP, having done all that was necessary, set his rig in motion anly to discover 3 hours later that he had forgot to disable the "cfn13 -'allow shooting without card" on his 40D, which was, predictably, without card.
Cheer up!