ID:13096 Not allowed to move at least <number> registers because they are fed by input pins

CAUSE: You attempted to optimize netlists by directing the Quartus Prime software to perform gate-level register retiming. However, the Quartus Prime software cannot move the specified number of registers because they are fed by pins directly or through combinational logic. Some of these registers are not moved because you specified that the Quartus Prime software not move logic across registers that are associated with I/O pins during register retiming to trade off t_CO and t_SU with f_MAX . Others are not moved because they are directly fed by input pins. The number of registers reported in this message may be lower than the actual number of registers fed by input pins, because some registers may not be allowed to be moved for other reasons.

ACTION: If you want to allow the Quartus Prime software to move these registers, direct the Quartus Prime software to move logic across registers that are associated with I/O pins during register retiming, or set the Netlist Optimizations logic option to Always Allow. Otherwise, no action is required.