Error (10002): Can't open VHDL or Verilog HDL file - Error (10002): Can't open VHDL or Verilog HDL file Description When compiling a design in the Quartus® II software, you may experience the following error message: Error (10002): Can't open VHDL or Verilog HDL file "{Hierarchy}/{file_name}" The error is caused when the hierarchy path exceeds the 256 character path limit. Resolution To work around this problem, shorten the hierarchy path below the 256 character path limit. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.0 ['Stratix® III FPGAs'] ['novalue'] ['novalue'] ['novalue']