Internal Error: Sub-system: FPP, File: /quartus/fitter/fpp/fpp_cell.cpp, Line: 703 - Internal Error: Sub-system: FPP, File: /quartus/fitter/fpp/fpp_cell.cpp, Line: 703 Description Due to a problem in the Quartus® II software versions 12.0, you may see this error message if you change a pin location while using incremental compilation. Resolution To work around this error, compile the design with all partitions set to Source . 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']