Paratroop problem

[erstad]

I'm trying to drop some paratroops in a test game versus the AI, and every time I run the turn the transports reset from "troop" with destination <censored> to "supply" with no destination. No paratroops drop.

I've checked everything I can think of that might matter
Target within normal range
Paratroops in combat mode; not part of a restricted command
Airfield is 4+

My only thoughts are:
- Is there maybe a minimum prep level for paradrop? (Would make some sense, but I don't recall seeing anything about that)
- Pilot error (me, not the transports). But I checked everything multiple times. What might I be missing?
- Bug?

I do have a save I could send to anyone interested. I don't want to post a screenie because, well, you know the walls have eyes.

[jwilkerson]

I've dropped paras a number of times and never had a problem.

I guess I need more data - can you give specifics? Who, where, riding on what from where to where,etc.