Log / Unlog Objects via script

[F.Braun]

Code:

y = grp.getvalue('32/1/7')
x = grp.tag('Aufzeichnung')

m = #(x)
test = x[1].address
t = '32/1/8' -- TEST
log(m,y,test,t)

if y == true then
  u = 99 -- if log 99 then if was successfull
    for i = 1,m,1 do
    z = x[1].address --
    grp.create({ address = '32/1/6', log = true })--works
    grp.create({ address = z, log = true })--doesnt work
    log(z,u)
  end
else
  u = 77 -- if log 77 then if wasnt successfull
      for i = 0,m,1 do
      grp.create({ address = x[i].address, log = false })
    end
end

One quick question. Why does the first line of grp.create work and the second doesnt? Do i need to Convert the variable z to something else then string?

I want to change alot of Objects that all got the same tags. 

-- F.Braun