get following errror in buggrabber -

["message"] = "RecipeKnown-0.27
colorgnomes.lua:111: attempt to index local \"color\" (a nil value)", ["time"] = "2011/12/07 14:20:35", ["locals"] = "info = <table> {\n offset = 0\n type = \"Merchant\"\n subtype = \"none\"\n colorlist = <table> {}\n itemname = \"MerchantItem\"\n perpage = 10\n updater = <func> @RecipeKnown
main.lua:505\n itemlist = \"none\"\n framepage = 1\n frame = MerchantFrame {}\n total = 5\n link = <func> =[C]:-1\n}\ncolorlist = <table> {\n 4 = 21099\n}\ncolordata = <table> {\n 4 = <table> {}\n}\ntype = \"Recipe\"\n(for generator) = <func> =[C]:-1\n(for state) = <table> {\n 4 = 21099\n}\n(for control) = 4\nslot = 4\nitemid = 21099\ntrueslot = 4\n(for generator) = <func> =[C]:-1\n(for state) = <table> {\n 1 = \"NameFrame\"\n 2 = \"SlotTexture\"\n 3 = \"ItemButtonIconTexture\"\n 4 = \"ItemButtonNormalTexture\"\n}\n(for control) = 1\nk = 1\nlayer = \"NameFrame\"\nbg = nil\nthisitem = MerchantItem4NameFrame {\n 0 = <userdata>\n}\nbg = <table> {\n 1 = 0.5\n 2 = 0.5\n 3 = 0.5\n}\n(*temporary) = <func> =[C]:-1\n(*temporary) = MerchantItem4NameFrame {\n 0 = <userdata>\n}\nbackgrounds = <table> {\n NameFrame = <table> {}\n}\nnodata = false\n", ["stack"] = "RecipeKnown-0.27
colorgnomes.lua:111: in function \"RecipeKnown_ColorBox\"\nRecipeKnown-0.27
colorgnomes.lua:133: in function \"RecipeKnown_ColorGnomes\"\nRecipeKnown-0.27
scanners.lua:441: in function \"RecipeKnown_ScanItems\"\nRecipeKnown-0.27
main.lua:507: in function \"MerchantFrame_UpdateMerchantInfo\"\nFrameXML
MerchantFrame.lua:71: in function \"MerchantFrame_Update\"\nFrameXML
MerchantFrame.lua:52: in function <FrameXML
MerchantFrame.lua:45>\n<in C code>\nFrameXML
UIParent.lua:1607: in function \"SetUIPanel\"\nFrameXML
UIParent.lua:1451: in function \"ShowUIPanel\"\nFrameXML
UIParent.lua:1338: in function <FrameXML
UIParent.lua:1334>\n<in C code>\nFrameXML
UIParent.lua:2044: in function <FrameXML
UIParent.lua:2032>\n<in C code>\nFrameXML
MerchantFrame.lua:29: in function <FrameXML
MerchantFrame.lua:20>",