Internal Error: Sub-system: CPT, File: /quartus/sys/cpt/cptc/cpt_ampp.c, Line: 5467 output_index < CPT_AMPP_MAX_SOURCES

Description

Due to problem in the Quartus® Prime Pro Edition Software version 18.1 and earlier, you may see this internal error when running each of the fitter phases separately in a design with more than 250 encrypted IPs.

Resolution

To work around this problem run the fitter phases in a single step with the following command:

quartus_fit <design name>