ID:169232 Can't place I/O pin <name> at the GXB transmitter pin location <name> -- possible switch coupling with <name> pin <name> with I/O standard <name> at pin location <name>

CAUSE: You assigned the specified I/O pin at the gigabit transceiver block (GXB) transmitter pin location in the device. However, the Fitter cannot place the pin at the location because of a possible switch coupling with other pin(s).

ACTION: Delete or change the location assignment, change the I/O standard assignment, or select the same target device with a different package.