error in l2server L2O

[sneakas]

12/20/2004 18:26:57.281, action packet target = 0
12/20/2004 18:26:58.031, action packet target = 0
12/20/2004 18:26:58.031, action packet target = 0
12/20/2004 18:27:37.218, action packet target = 0
12/20/2004 18:27:41.843, [NpcSocket.cpp][1077] Not a cached buy-sell list[1108437384]
12/20/2004 18:28:27.890, action packet target = 0
12/20/2004 18:29:23.109, action packet target = 0

what is this and where can i find *.cpp files ?

 

[DamienStone]

i get those same errors. I have no idea what they do but they dont seem to bug my server.