Error(271011): Can't make global setting DUPLICATE_REGISTER using ALTERA_ATTRIBUTE - Error(271011): Can't make global setting DUPLICATE_REGISTER using ALTERA_ATTRIBUTE Description Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 19.1, the message above might be seen when using the manual register duplication ( DUPLICATE_REGISTER ) feature as a 'altera_attribute' synthesis attribute. Resolution To work around this problem, set the DUPLICATE_REGISTER assignment in the Intel® Quartus® Prime Software settings file (.qsf). set_instance_assignment -name DUPLICATE_REGISTER -to <register_name> <num_duplicates> Custom Fields values: ['novalue'] Troubleshooting 14010271617 False ['Generic Component'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 19.4 19.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']