Internal Error: Sub-system: NVD, File: /quartus/nlv/nvd/nvd_vdiimpl.cpp, Line: 2827 - Internal Error: Sub-system: NVD, File: /quartus/nlv/nvd/nvd_vdiimpl.cpp, Line: 2827 Description Due to a problem in the Quartus® II software version 13.1, you may see this error when launching the RTL viewer. Resolution This problem is fixed beginning with the Quartus II software version 13.1.2. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 13.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']