differential DQS pin DDR3 in ARRIAV stater kit

I have a problem with the connection differential DQS pin for DDR3 in ARRIAV stater kit

after adding in the project bidir ALTIOBUF megafunction IP core differential mode I'm getting the below error message:

Error (15852): Output port "OBAR" of PSEUDO_DIFF_OUT primitive "altiobuf:altiobuf|altiobuf_iobuf_bidir_lnp:altiobuf_iobuf_bidir_lnp_component|pseudo_diffa_0" must drive only one OBUF primitive on the I port and cannot drive anything else

Error (21207): "OEBOUT" port of the single-ended output buffer "altiobuf:altiobuf|altiobuf_iobuf_bidir_lnp:altiobuf_iobuf_bidir_lnp_component|pseudo_diffa_0" is not connected

pin assigned correct

set_instance_assignment -name IO_STANDARD "DIFFERENTIAL 1.5-V SSTL CLASS I" -to dqs[0]

set_instance_assignment -name IO_STANDARD "DIFFERENTIAL 1.5-V SSTL CLASS I" -to dqs[1]

set_location_assignment PIN_F23 -to dqs[1]

set_location_assignment PIN_F22 -to dqs[0]

set_location_assignment PIN_G23 -to "dqs[1](n)"

set_location_assignment PIN_G22 -to "dqs[0](n)"

How to solve this problem?