Why does my ALTDQ_DQS2 IP fail to fit?

Description

This error may be seen in the Intel® Quartus® Prime Standard Edition Software on a design containing the ALTDQ_DQS2 IP. This error occurs when the read_write_data_io signal feeds back towards the core logic:

Error (170143): Final fitting attempt was unsuccessful

    Info (170138): Failed to route the following signal(s)

        Info (170139): Signal "<hierachy_name>|altdq_dqs2_<device_family>:<hierachy_name>|input_path_gen[*].read_fifo_out[*]"

Resolution

To avoid this error, remove the read_write_data_io signal feeding back towards the core. This feedback to core connection is not allowed.