When PRC is used for an UltraScale device and Clearing Bitstream is set at address0, it always reads from address1.
Version Found: 2015.3
Version Resolved: TBD
A work-around is to program the PRC in the netlist.
The correct values can be set there using set_rm_bs_index and set_rm_clearing_bs_index.
set tmp [get_rm_bs_index]
# Store the current partial BS address
# Swap the partial and clearing addresses