ERROR attempt to call method 'SetMaterialTexture' (a nil value)

[AnonTakesOver]

[ERROR] gamemodes/halo/entities/weapons/halo_dm_ma5b/cl_init.lua:42: attempt to call method 'SetMaterialTexture' (a nil value)
1. unknown - gamemodes/halo/entities/weapons/halo_dm_ma5b/cl_init.lua:42

Can someone please help me with this error?

at line 42 is
[lua]
num_one:SetMaterialTexture( "$basetexture", numtexture_one )
[/lua]

Much appreciated

[c👌de_g🎷]

As of GMod 13, IMaterial:SetMaterialTexture(String parameter, Texture value) is now IMaterial:SetTexture(String parameter, Texture value).