SDI II receiver implementation problem

Hello and good year,

I would like to implement a SDI II (v14.0) receiver on my cyclone V (5CSXFC5C6U23I7), but when i compile I got this error :

Error: The pin driving the input 'DATAIN' of node 'SDI2_receiver:SDI_receiv_inst|SDI2_receiver_0002:sdi2_receiver_inst|altera_xcvr_native_av:u_phy|av_xcvr_native:gen_native_inst.av_xcvr_native_insts[0].gen_bonded_group_native.av_xcvr_native_inst|av_pma:inst_av_pma|av_rx_pma:av_rx_pma|rx_pmas[0].rx_pma.rx_pma_buf' must have a fanout of 1.

Info: No legal values found

I suspect a bad pin assignment for the SDI Rx input but I don't know why. I implement a SDI Transmitter the same way but it work well.

Do you have any ideas to solve my problem ?

Thanks a lot !