ID:176225 Can't pack node <name> to I/O pin

CAUSE: You turned on the Auto Packed Registers option, and turned on the Fast Input Register , Fast Output Register , and/or Fast Output Enable Register option for the specified node. The specified node can also be a PLL compensated pin in source synchronous mode. However, the Fitter cannot pack the node to an I/O pin. This message can occur, for example, if there is not a direct connection between the register and the I/O pin. If this is not the reason why the Fitter could not pack the node to an I/O pin, click the + icon in the Messages window or the Messages section of the Report window to display details on why the node could not be packed.

ACTION: If you don't want the Fitter to pack the specified node, no action is required.