If you turn on Use rx_channel_data_align input port in the ALTLVDS_RX MegaWizard Plug-In Manager generation fails for Stratix IV - If you turn on Use rx_channel_data_align input port in the ALTLVDS_RX MegaWizard Plug-In Manager generation fails for Stratix IV Description On the Receiver settings tab of the Parameter Settings page of the ALTLVDS_RX MegaWizard Plug-In Manager, if you turn on Use ‘rx_channel_data_align’ input port , generation fails with a message similar to the following: Error: Port rx_data_align_reset is being set to the state USED which is incompatible with the current settings of IMPLEMENT_IN_LES(OFF), INTENDED_DEVICE_FAMILY(Stratix IV), rx_data_align(UNDEFINED). The legal state is UNUSED . Resolution Turn off Use ‘rx_channel_data_align’ input port . Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.0 ['Stratix® IV FPGAs'] ['novalue'] ['novalue'] ['novalue']