diff --git a/README.md b/README.md
index a02cfb2..32b760f 100644
--- a/README.md
+++ b/README.md
@@ -141,7 +141,7 @@ API
   
   - **colddb.add_tag(db,name,tag)**
   
-  -
+  - Creates a folder from the given table in tag.
   
   - **colddb.get_or_add_tag(db,name,tag) --> tag_name**
   
diff --git a/colddb.lua b/colddb.lua
index 5c1e734..4160430 100644
--- a/colddb.lua
+++ b/colddb.lua
@@ -384,7 +384,11 @@ local function iterate(db,func_on_iterate,end_func,count,cs,args)
 	extended_api.Async.iterate(db.async_pool,1,count,function(i)
 		local line = fl:read("*l")
 		if args.do_not_skip_removed_items or not db.indexes_pool[cs].deleted_items[line] then
-			func_on_iterate(line,i,args)
+			local ar = func_on_iterate(line,i,args)
+			if ar then
+				args = ar
+				return args
+			end
 		end
 	end,function() 
 		if end_func then
@@ -454,6 +458,7 @@ function colddb.iterate_index_table(db,begin_func,func_on_iterate,end_func,args,
 		-- Start iterating the index table
 		iterate(db,func_on_iterate,end_func,c,cs,args)
 	elseif f and f.file then
+		local fl = f.file
 		-- If its iterating some other function then add this one to the queue list
 		fl:seek("set")
 		local c = tonumber(fl:read("*l"))