Internal Error: Sub-system: VPR20KMAIN, File: /quartus/fitter/vpr20k/altera_arch_common/altera_arch_re_network_routing_constraints.cpp, Line: 1437

Description

Due to a problem in the Intel® Quartus® Prime Pro Edition software version 17.1 Update 2 and earlier, you may see this Internal Error in a fitter plan stage.

Resolution

This problem is fixed beginning with the Intel® Quartus® Prime Pro Edition software version 18.0 Update 1.