Error must print check before setting ready to post

Hi ,

I have the 2 following error message here on AP Payment Batch List: You must print all checks for batch XXX before setting it ready to post. batch.

And when I open the batch another error says "You must print all checks for batch XXX before settin it ready to post

Any idea since I don't want to change the check number and should be allow to use the same check number since the batch hasn't been posted yet.

thanks