Why do I get the following error message when using the PCI Express HardIP "Error: PLL "<variation name>_example_chaining_pipen1b:core|<variation name>_plus:ep_plus|<variation name>:epmap|<<variation name>_serdes:serdes|<variation name>_serdes_alt_c3gxb_a - Why do I get the following error message when using the PCI Express HardIP "Error: PLL "<variation name>_example_chaining_pipen1b:core|<variation name>_plus:ep_plus|<variation name>:epmap|<<variation name>_serdes:serdes|<variation name>_serdes_alt_c3gxb_a Description The below error occurs when you use the PCI Express® HardIP and if you have installed Quartus® II with only a limited set of devices. For example, only Cyclone® IV GX device support has been installed. To workaround this error, you can simply re-install Quartus II ensuring that all device famlies are installed, and then regenerate the PCI Express IP. This problem will be fixed in a future version of the Quartus II software. Error: PLL "<variation name>_example_chaining_pipen1b:core|<variation name>_plus:ep_plus|<variation name>:epmap|<<variation name>_serdes:serdes|<variation name>_serdes_alt_c3gxb_aac8:<variation name>_serdes_alt_c3gxb_aac8_component|altpll:pll0|altpll_ld81:auto_generated|pll1" has port CLK[0] connected but parameters clk0_multiply_by and/or clk0_divide_by are either unspecified or set to 0 Related Articles Are there any known issues when installing the Quartus II software without all the device families? Custom Fields values: ['novalue'] Troubleshooting novalue False ['PCI Express'] ['novalue'] novalue novalue ['Arria® II GX FPGA', 'Arria® II GZ FPGA', 'Cyclone® IV GX FPGA', 'Stratix® IV GT FPGA', 'Stratix® IV GX FPGA'] ['novalue'] ['novalue'] ['novalue']