sift quantisation error

Hi guys,
I executed the sift command and received the following warning, what should I do to fix this?
thanks in advance
command: tcksift -act 5tt_nocoreg.mif -term_number 2000000 tracks_20mio.tck wmfod.mif sift_2mio.tck

Hello Fateme,

I think that question was best answered by @rsmith in this post. Does that address your concerns?