DALI lamp and ballast error query

[leonidas]

Hello,

I need to get feedback of DALI lamp and ballast status. I tried to get lamp failure it with code like this: 
but it doesn't work, nothing appears in Alerts. Can someone help me with this?

Code:

require('user.dali')
res = dalicmd('internal', 'querylampfailure', { addrtype = 'short', address = 0 })
if res then
 alert(res)
end