Why are the assignments via altera_attribute not being applied correctly? - Why are the assignments via altera_attribute not being applied correctly? Description Due to a problem in the Quartus® II software version 13.1 and earlier, the Verilog HDL synthesis attribute may not be processed correctly if you were using pragma-style attributes. Example: output dataout /* synthesis altera_attribute="-name VIRTUAL_PIN ON" */; Resolution To work around this problem, use Verilog HDL 2001 style attributes. Example: (* altera_attribute = "-name VIRTUAL_PIN ON" *) output dataout; This problem is scheduled to be fixed in a future version of the Quartus II software. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']