Embarking arty next to an enemy BB

[larryfulkerson]

So there I was playing my Barbarosa 41 scenario when I attempted to switch the 818th arty from a single attack to a group attack and
I must have hit the wrong mouse button or something but the arty unit embarked itself onto the train and rendered itself unable to
disembark. I have no idea what combination of key presses and mouse clicks got me into this mess but I'm guessing next turn I can
disembark it and THEN shoot at the BB. So if you can't fix it I'll be able to keep going nonetheless. I did a save game right after this
happened but the forum rules don't allow more than 200K for this forum section so I can't post the 250K save game file and don't know
quite what to do with it. Anybody have a good idea?.