Error(271004): Can't process assignment. Attribute format is illegal -- parsing error <text> (line <number>). Use legal format for ALTERA_ATTRIBUTE assignment. - Error(271004): Can't process assignment. Attribute format is illegal -- parsing error <text> (line <number>). Use legal format for ALTERA_ATTRIBUTE assignment. Description Due to a problem in the Intel® Quartus® Prime Pro Edition software in Linux* OS, this error may occur when trying to compile a design that was generated in Windows* OS and contains multiline syntax in the ALTERA_ATTRIBUTE. Example: (* altera_attribute = "-name VIRTUAL_PIN ON -to a[*]; \ -name VIRTUAL_PIN ON -to b[*]; \ -name VIRTUAL_PIN ON -to clock" *) The use of multiline syntax for ALTERA_ATTRIBUTE in the Intel® Quartus® Prime Pro Edition software in Windows* OS contains Windows* DOS* line endings that may cause this error. Resolution To work around this problem in the Intel® Quartus® Prime Pro Edition software in Linux* OS, convert the design file to use UNIX* line ending format. Custom Fields values: ['novalue'] Troubleshooting 22010886838 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 20.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']