I am using koha 2.2.9 on windows When i go to  parameters->Barcode genarators  at first i go to "go to printer cofiguration" then save it.Then back to Barcode genarators screen then there are options "from" and  "to"...i dont understand what  is those and what will i input in those field....there is show an error "Can't find inventory codes in that range. Please try again." Please help me about this... Morium Morshed