arithmatic or convertion error

HI Experts!

iam running deltas daily,toady i got a error arithmatic or convertion error found in routine_0006 for record 12568.i tried to debug but i could not get solution.

I compared this record with other records.still i dint find any errors.In this datapacket all the records having same billing document.One of the field(billing quantity in) is zero.can it have the value zero.how to find the error in that record.can any expert help me out.

diya