Thanks. But it still gives error and that is

(/home/vafa/texmf/tex/luabidi/luabidi.sty) <luatex-fonts.lua loaded in 0.023 se

conds> ) (test.aux)

! Font \OT1/cmr/m/n/17.28=cmr17 at 17.28pt not loadable: metric data not found

or bad.

<to be read again>

relax

l.10 \section{مقدمه}

?

The error is understanable. But can it be fixed in the .lua codes or I have to write some macros to change this?

Thanks