"Error processing command! Please report this in the forums."

[tab]

Okay, if you're in a party, and you try to walk into a room with something in it about to spawn, my party members do not follow and the game kicks out an error.  They still register as being in my party (even if they are in a different room), and if I walk into the previous room, they're still there and it acts like nothing's happened.

Here's a short log, important parts bolded.

The following people are in your travel party:
  Tabbran                       (Ninja)               [H: 88%] R - Frontrank
  Dentata Bites                 (Warrior)             [H:100%] R - Backrank
Elric just entered the Realm.
[HP=433 (Resting) ]:
Cracked Tunnel
Also here: Dentata.
Obvious exits: north, south, southeast
[HP=433 (Resting) ]:hide
Attempting to hide...
[HP=433]:s
Cracked Tunnel
Obvious exits: north, south
Dentata walks into the room from the north.
[HP=433]:sn
Attempting to sneak...
[HP=433]:n
Sneaking...
A purple worm burrows in from north.
A purple worm burrows in from north.
Cracked Tunnel
Also here: purple worm, purple worm.
Obvious exits: north, south, southeast
Error processing command! Please report this in the forums.
[HP=433]:break
You are no longer sneaking.
[HP=433]:a purple worm
*Combat Engaged*
[HP=433]:par
The following people are in your travel party:
  Tabbran                       (Ninja)               [H:100%]   - Frontrank
  Dentata Bites                 (Warrior)             [H:100%]   - Backrank
The purple worm lunges at you, but you dodge out of the way!
The purple worm lunges at you, but you dodge out of the way!
You critically slash purple worm for 101 damage!
You slash purple worm for 25 damage!
You swing at at purple worm!
You cut purple worm for 23 damage!
You swing at at purple worm!
[HP=433]:(Dmg:149 Tot:149)
s
The purple worm lunges at you, but you dodge out of the way!
The purple worm lunges at you!
You slice purple worm for 28 damage!
purple worm takes 3 damage from the cold!
You slash purple worm for 31 damage!
You slash purple worm for 30 damage!
You slice purple worm for 26 damage!
purple worm takes 2 damage from the cold!
You cut purple worm for 20 damage!
purple worm takes 2 damage from the cold!
[HP=433]:(Dmg:135 Tot:284)
Cracked Tunnel
Also here: Dentata.
Obvious exits: north, south
Dentata walks into the room from the north.
A purple worm burrows in from north.
A purple worm burrows in from north.

[tab]

And then if you move one more room, it warps the person left behind in with you!  From the view of the other char:

-- Following your Party leader up --
Cracked Tunnel, Hole Down
Also here: Tabbran.
Obvious exits: northwest, down
You hear movement to the northwest.
You hear movement to the northwest.
Jigga just disconnected!!!
[HP=708]:
Cracked Tunnel, Hole Down
Obvious exits: northwest, down
The room is dimly lit
Tabbran peeks in from the northwest!
-- Following your Party leader east --
Cracked Tunnel
Also here: Tabbran.
Obvious exits: east, west
A red worm burrows in from west.
[HP=708]:
Cracked Tunnel
Also here: Tabbran, red worm.
Obvious exits: east, west

[tab]

Further update:

This happens when the party leader is sneaking.  It doesn't happen if they're not sneaking.  Likewise, you can use this bug to use sneak to warp people past rooms with monsters in them, as they'll skip rooms that things spawn in until there isn't a room with a spawn about to happen.

[tab]

Bypassed two rooms with mobs in them, warped a warrior past.

w
Sneaking...
Cracked Tunnel
Also here: purple worm, fierce purple worm.
Obvious exits: east, northwest, southeast
Error processing command! Please report this in the forums.
[HP=433]:
Cracked Tunnel
Also here: purple worm, fierce purple worm.
Obvious exits: east, northwest, southeast
[HP=433]:nw
Sneaking...
A nasty purple worm burrows in from north.
A small purple worm burrows in from north.
Cracked Tunnel
Also here: nasty purple worm, small purple worm.
Obvious exits: north, south, southeast
Error processing command! Please report this in the forums.
[HP=433]:n
Sneaking...
You make a sound as you enter the room!
Cracked Tunnel
Obvious exits: north, south
Dentata walks into the room from the south.
[HP=433]:sn
Attempting to sneak...
[HP=433]:
Cracked Tunnel
Also here: Dentata.
Obvious exits: north, south

[Vitoc]

Thank you for the detail.  It helped track down the problem quickly.