Whilst testing out the BP2 intro movie (

) with the latest trunk, it crashes with the following error:
Unknown error.
In sexpression: ( when
( true )
( set-camera-position 1011 361 17394 )
( set-camera-target
"Nelson"
"Fighterbay"
)
)
(Error appears to be: Fighterbay)
ntdll.dll! ZwWaitForSingleObject + 21 bytes
kernel32.dll! WaitForSingleObjectEx + 67 bytes
kernel32.dll! WaitForSingleObject + 18 bytes
fs2_open_3_6_11d.exe! SCP_DumpStack + 294 bytes
fs2_open_3_6_11d.exe! Error + 229 bytes
fs2_open_3_6_11d.exe! post_process_mission + 1577 bytes
fs2_open_3_6_11d.exe! parse_mission + 1531 bytes
fs2_open_3_6_11d.exe! parse_main + 449 bytes
fs2_open_3_6_11d.exe! mission_load + 215 bytes
fs2_open_3_6_11d.exe! game_start_mission + 189 bytes
fs2_open_3_6_11d.exe! game_enter_state + 482 bytes
fs2_open_3_6_11d.exe! gameseq_set_state + 310 bytes
fs2_open_3_6_11d.exe! game_process_event + 242 bytes
fs2_open_3_6_11d.exe! gameseq_process_events + 152 bytes
fs2_open_3_6_11d.exe! game_main + 745 bytes
fs2_open_3_6_11d.exe! WinMain + 330 bytes
fs2_open_3_6_11d.exe! __tmainCRTStartup + 358 bytes
fs2_open_3_6_11d.exe! WinMainCRTStartup + 15 bytes
kernel32.dll! BaseThreadInitThunk + 18 bytes
ntdll.dll! RtlInitializeExceptionChain + 99 bytes
ntdll.dll! RtlInitializeExceptionChain + 54 bytes
It's pulling the UNKNOWN_ERROR value from line 1772 of sexp.cpp while checking the sexps in post_process_mission.
How it's getting there, I don't know

I haven't quite figured out how to make a much smaller case, but if I do figure out how, I'll post it here.