Why can't the back annotation command execute successfully? - Why can't the back annotation command execute successfully? Description Due to a syntax error in AN903 2019.12.03 Section 1.3.1 Lock Down Clocks, RAMs and DSPs, when you run quartus_cdb to back annotate the Clocks, RAMs and DSPs as illustrated in the application note "quartus_cdb --back_annotate [--dsp] [--ram] [--clock] <design_name> ", you may encounter the following error: Error (39005): Specify a project for Compiler Database Interface (quartus_cdb) Resolution To work around the error, use the following command: quartus_cdb <design_name> --back_annotate [--dsp] [--ram] [--clock] This syntax error is fixed starting with the updated 2020.03.23 AN903 documentation. Custom Fields values: ['novalue'] Troubleshooting 1507769426 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 19.3 19.3 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']