ID:169182 Cannot place I/O pin <name> in pin location <name> -- possible switch coupling with I/O pin <name> with I/O standard <name> in pin location <name>.

CAUSE: You assigned the specified I/O pin as DCLK in the device. However, the Fitter cannot place the pin at the location because of switch coupling with other pin(s).

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