Quetion for the LVDS at transmitter side

Dear Sir,

I have a question about the option as the attached file, when

using MegaWizard to create a LVDS for tx. What is the option

for? Thanks.

It will cause an error in my design as below.

Error: Output port "DATAOUT" of DDIO_OUT WYSIWYG "altlvds_tx_top:altlvds_tx_top|altlvds_tx:altlvds_tx_component|altlvds_tx_top_lvds_tx:auto_generated|altlvds_tx_top_ddio_out:ddio_out|ddio_outa_0" has invalid signal-splitter fan-outs.

Regards,

Peter Chang