Due to a problem in the Intel® Quartus® Prime Pro Edition software version 17.1 and earlier, you may see this internal error at the fitter stage when redundant pin settings exist for the XCVRs in the design.
Device Family: Intel® Stratix® 10
Intel Software: Quartus Prime Pro
Type: Answers
Area: Tools
Last Modified: Tue Apr 30 2019 01:42:00 GMT-0700
Version Found: v17.1
Bug ID: 2205664864
Internal Error: Sub-system: CONSTRA, File: /quartus/db/constra/constra_mvsat_bcm_solver.cpp, Line: 523
Description
Workaround/Fix
To work around this problem, delete unused pin assignments in the design.