Error (10476): VHDL error at .vhd(88): type of identifier "fboutclk" does not agree with its usage as "std_ulogic" type - Error (10476): VHDL error at .vhd(88): type of identifier "fboutclk" does not agree with its usage as "std_ulogic" type Description Due to a problem with the Arria® V Transceiver PLL Intel® FPGA IP core in Intel® Quartus® Prime Standard Edition version 18.1 software, you may observe error similar to above during Analysis & Elaboration compilation if the IP variation file type is VHDL. Resolution Change the following in the <ip_instance_name> .vhd : From fboutclk(0) => fboutclk, hclk(0) => hclk, To fboutclk(0) => fboutclk(0), hclk(0) => hclk(0), This problem is fixed starting with the Intel® Quartus® Prime Standard Edition software version 19.1. Custom Fields values: ['novalue'] Troubleshooting 1507297052 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Standard'] 19.1 18.1 ['Arria® V GT FPGA', 'Arria® V GX FPGA', 'Arria® V ST FPGA', 'Arria® V SX FPGA'] ['novalue'] ['novalue'] ['novalue']