Customer Open item

HI Experts,

I just taken the report in open customer line item through fbl5n as on today

The same day I just generate balance sheet figure (S_ALR_87012284) to know the sundry debtors total amount

My question is that Fbl5n open item total should equal to the sundry debtors total, right

If any difference what should the next step, any sap notes or some thing?

regards,

Sanju M S