Z-program to block F110 payment run proposal item?

Has anyone successfully been able to block items in an F110 proposal using a program or enhancement during the proposal?

We're trying to automate our payment run process and when we come across inconsistencies, we'd like to block them in the proposal then continue the Payment Run & send the file out to the bank.

Is there a standard program / FM / BAPI which would allow you to block in the proposal (not on the AR line item)?

thanks,

Robert.