Error: Internal Error: Sub-system: SIN, File: /quartus/tsm/sin/sin_micro_tnodes_utility.cpp, Line: 431 - Unknown I/O cell name: 'dibss'

Description

Due to a problem in the Intel® Quartus® Prime Pro Edition software version 20.3,  you may see this error due to unrecognised and unbypassed new pins added in Direct Interface Bus (DIB) IP Intel® pins for IO timing during compilation in Intel® Stratix®10 devices.

Resolution

A patch is available to workaround this problem for the Intel® Quartus® Prime Pro Edition software version 20.3.  Download and install Patch 0.46pro from the appropriate link below.

Download patch Intel® Quartus® Prime Pro Edition 20.3 Patch 0.46pro for Windows (.exe) 

Download patch Intel® Quartus® Prime Pro Edition 20.3 Patch 0.46pro for Linux (.run) 

Download the Readme for Intel® Quartus® Prime Pro Edition 20.3 Patch 0.46pro (.txt)

This problem is fixed beginning with the Intel® Quartus® Prime Pro Edition software version 21.1