how to update payment block key in f110 through zprogram..?

Hi Experts,

For the F110(Automatic Payment program) we Have created a Z programme to update the REGUP-ZLSPR with block indicator for some of the invoices. This is updating the REGUP-ZLSPR properly.

But when we run the F110 for payment it does not consider those block indicator and displays all the invoices for payment.

Please let me know if there is any other way other than blocking it manually.

We have searched for lot of options like BADI,BAPI,BDC&BTE but unable to find the desired result.

Please give the reply ASAP.

Thanks in Advance.

Best Regards,

Ram