Error: PLL Parameters for the device family Cyclone III could not be read - Error: PLL Parameters for the device family Cyclone III could not be read Description You may see this error in the Quartus ® II software version 14.0 when you open a design from a previous version of the Quartus II software. This errors occurs when the design contains an ALTPLL IP core and targets a Cyclone ® III device. The Cyclone III device family is not supported in the Quartus II software version 14.0. In addition to the error message, you cannot modify or migrate this design in the Quartus II software v14.0. Resolution To avoid this error, perform one of the following actions Do not upgrade the Quartus II software to v14.0 In the Quartus II software v13.1, change the device family to one supported in version 14.0 Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 14.0 ['Cyclone® III FPGAs', 'Cyclone® III LS FPGA'] ['novalue'] ['novalue'] ['novalue']