ERROR OnREQMoveTilePos

[Hikn]

[Sat Jan 21 2012 13:54:17.865345 105847696]: [##ERROR##] OnREQMoveTilePos(char:904) : iDxBgn(217, 169), pkPnt(511, 167)
[Sat Jan 21 2012 13:54:17.865430 105847696]: [##ERROR##] 'MoveStepBySkill' fail (Proc/Skill/SkillG001.cpp:255)
[Sat Jan 21 2012 13:54:17.865458 105847696]: [##ERROR##] UsrMap Fail : MainCmd(174) Ret(5B00FF:91:255) Addr(118.68.120.168)
[Sat Jan 21 2012 13:54:17.872334 3115504]: sock 11=> close by finish waiting(118.68.120.168)
[Sat Jan 21 2012 13:54:17.872475 3115504]: 1.close user 11 [B7E1A338] (118.68.120.168)

Someone help me... why can i use skill ( 167 )?

[MentaL]