Error while creating budget billing plan EA61

Hi Experts,

While creating a BBP through EA61 , I get error -

Message class - EBILL_CORR , No. - 034 - Extrapolation is inconsitent for equipment & , register & .

I am creating BBP manually after move-in with Move-in date as 02.02.2012.

on MRU period end is 28.02.20XX.

Anyone knows why I am getting this error ?

Thanks in advance.

Nachiket.