Grimrock

Hello,just got the game,but playing after a while it randomly crashes and shows the following error

[string "Item.lua"]:0: attempt to index field 'arch' (a number value)
stack traceback:
[string "Item.lua"]: in function 'update'
[string "Map.lua"]: in function 'updateEntities'
[string "Dungeon.lua"]: in function 'updateLevels'
[string "GameMode.lua"]: in function 'update'
[string "Grimrock.lua"]: in function 'display'
[string "Grimrock.lua"]: in main chunk

OS Version 6.1

OEM ID: 0
Number of processors: 4
Page size: 4096
Processor type: 586

Total memory: 6142 MB
Free memory: 3897 MB

Display device 0:
Device name: \\.\DISPLAY1
Device string: ATI Radeon HD 4800 Series
State flags: 08000005

Display device 1:
Device name: \\.\DISPLAY2
Device string: ATI Radeon HD 4800 Series
State flags: 00000000

Display device 2:
Device name: \\.\DISPLAYV1
Device string: RDPDD Chained DD
State flags: 00200008

Display device 3:
Device name: \\.\DISPLAYV2
Device string: RDP Encoder Mirror Driver
State flags: 00200008

Display device 4:
Device name: \\.\DISPLAYV3
Device string: RDP Reflector Display Driver
State flags: 00200008

Any ideas?

EDIT: Tried reinstalling directx and Vcredist from the game folder but the error still occurs.