Send this link to support…
http://forum.mikrotik.com/t/v7-9rc-is-released/165607/1
You can extract the file get-custom-defconf from routeros-7.9rc2-mipsbe.npk in the folder \nova\lib\defconf
If you open it, still present those fking lines…
Accidentally the already converted block was not deleted, old code and unused chunks were left from line 983 to line 995.