Found unknown error in Block Symbol File - Found unknown error in Block Symbol File Description The Quartus® II software versions 10.0 and later may generate this error if you have spaces in your project path name. When this is the case, other variation files such as Verilog HDL ( .v ) or VHDL ( .vhd ) are created in your project folder, but the Block Symbol File ( .bsf ) is not created. To work around this issue, make sure that project name and project path does not contain spaces. Related Articles How do I update symbols in the Block Editor in the Quartus II software version 10.0? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']