ID:176222 Fitter will not automatically pack the registers into I/Os.

CAUSE: The Optimize IOC Register Placement for Timing logic option is turned off. This setting prevents the Fitter from automatically packing the registers connected to input, output, or output enable pins into I/Os. However, the Fitter will still attempt to perform register packings that are specified by user assignments, for example, the Fast Input Register , the Fast Output Register , or the Fast Output Enable Register assignments.

ACTION: No action is required.