Internal Error: Sub-system: FSV, File: /quartus/fitter/fsv/fsv_module.cpp, Line: 2408 - Internal Error: Sub-system: FSV, File: /quartus/fitter/fsv/fsv_module.cpp, Line: 2408 Description Due to a problem in the Quartus® II software version 12.0 and later, you may see this error if you have assigned an input HSSI pin with no fan-out. Resolution To work around this problem, remove the location assignment for the HSSI pin with no fan-out. This problem is fixed beginning with the Quartus II software version 12.1. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.1 12.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']