Internal Error: Sub-system: CONSTRA, File: /quartus/db/constra/constra_mvsat_bcm_solver.cpp, Line: 407 - Internal Error: Sub-system: CONSTRA, File: /quartus/db/constra/constra_mvsat_bcm_solver.cpp, Line: 407 Description Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 18.1 and earlier, this internal error may occur when two adjacent IOs in the same bank have conflicting IO standards. Resolution To avoid this internal error, check and resolve any conflicting the IO standard assignments in the same bank. Custom Fields values: ['novalue'] Troubleshooting 1408790692 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 18.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']