Critical Issue
Due to a PCIe® HardIP connectivity bug in Quartus® II software version v12.1 SP1, an error message of the following format shown below will be seen:
Error (175019): Illegal constraint of I/O pad to the location <PIN_LOCATION>
Info (175028): The I/O pad name: pcie_rstn
Error (10104): Unable to find a path between I/O pad and PINPERST port of PCI Express Hard IP.
Error (10151): "<PIN_LOCATION>" is not a legal location for "I/O pad" connected to PINPERSTN of PCI Express Hard IP.
Info (175029): 1 location affected
Info (175029): <PIN_LOCATION>
Error (175001): Could not place Hard IP
Info (175028): The Hard IP name: <Instant>|altpcie_cv_hip_avmm_hwtcl:pcie_cv_hip_avmm_0|altpcie_cv_hip_ast_hwtcl:c5_hip_ast|altpcie_av_hip_ast_hwtcl:altpcie_av_hip_ast_hwtcl|altpcie_av_hip_128bit_atom:altpcie_av_hip_128bit_atom|arriav_hd_altpe2_hip_top
Error (175006): Could not find path between source HSSI RX PLD PCS Interface and the Hard IP
Info (175026): Source: HSSI RX PLD PCS Interface ep_g1x4:u0|altpcie_cv_hip_avmm_hwtcl:pcie_cv_hip_avmm_0|altpcie_cv_hip_ast_hwtcl:c5_hip_ast|altpcie_av_hip_ast_hwtcl:altpcie_av_hip_ast_hwtcl|altpcie_av_hip_128bit_atom:altpcie_av_hip_128bit_atom|av_xcvr_pipe_native_hip:g_pcie_xcvr.av_xcvr_pipe_native_hip|av_xcvr_native:inst_av_xcvr_native|av_pcs:inst_av_pcs|av_pcs_ch:ch[0].inst_av_pcs_ch|av_hssi_rx_pld_pcs_interface_rbc:inst_av_hssi_rx_pld_pcs_interface|wys
Error (175022): The HSSI RX PLD PCS Interface could not be placed in any location to satisfy its connectivity requirements
Error (175022): The Hard IP could not be placed in any location to satisfy its connectivity requirements