So I'm trying to use some PB days to get rid of a 4 day next month. I have 5 days to use, it processed today but says "1: NOT ALLOWED UNTIL NEXT MONTH'S SCHEDS".

The trip is a carry out pairing that we discussed a few pages ago. The last day goes into what'll be the September bid period. So what does the reason report mean? Will I be able to use PB days or am I hosed b/c of the carry out pairing?