Internal Error: Sub-system: NPP, File: /quartus/nlv/npp/npp_sgate_reconstructor.cpp, Line: 953

Description

Due to a problem in the Intel® Quartus® Prime Pro Edition Software v21.2, you might see this internal error when opening the register transfer level (RTL) viewer for designs targeting Intel Agilex® devices with imported partitions.

Resolution

To work around this problem, remove the "qdb" folder prior to compiling your design.

This problem is scheduled to be resolved in a future release of the Intel® Quartus® Prime Pro Edition Software.