Two Issues:
1) How do you void a cheque after you have posted using manual cheques and retrieved in GL?

2) I used the "prepayment" feature w/ no invoice through manual cheques. It DR AP, CR CASH. Now I have entered an AP invoice and posted. I tried to apply prepayment and invoice through manual cheques to zero out account. I printed cheque and it says, "nothing to print", which is ok. Logically, then you should be able to "post", however, it created error batch because it wanted to print cheque... thus "circular problem"???
2a) Did i go through correct procedure?
2b) How do i correct error?

Thank you.