Why does Fitter report error when assigning nPERSTL1 pin to pcie_rstn input of the PCIe Hard IP core for 5CGXFC3 device family? - Why does Fitter report error when assigning nPERSTL1 pin to pcie_rstn input of the PCIe Hard IP core for 5CGXFC3 device family? Description 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 Resolution This issue will be fixed in Quartus II software version v13.0. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 12.1.1 ['Cyclone® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']