Error: no such variable (read trace on env (IP_ROOTDIR)) - Error: no such variable (read trace on env (IP_ROOTDIR)) Description You may receive the above error message when generate the FIR II Megacore®. Resolution To work around this issue, please set a new environment variable " IP_ROOTDIR " to "%QUARTUS_ROOTDIR%\..\ip\. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 15.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']