ID:15598 Incompatible pin pair assignment. RX pin < <text> > is assigned to pin location <text>; TX pin < <text> > is assigned to pin location <text>, but the pin locations are not compatible. To correct the incompatibility, assign the specified RX pin to pin location <text> or remove the pin assignments.

CAUSE: The specified RX and TX pin pairs are assigned to incompatible locations.

ACTION: Change the pin assignments in your design to correct the incompatibility. You can assign the specified RX pin to the suggested pin location to correct the incompatibility or you can remove the pin assignment.