Internal Error: Sub-system: HDB, File: /quartus/db/hdb/hdb_inst_name.cpp, Line: 1613

Description

Due to a problem in the Quartus® II software version 13.0 and later, you may see this internal error during the Fitter if your design has location assignments for the complement pin of a differential pin.

Resolution

To work around this problem, delete the location assignment to the complement pin. The location of the complement pin is automatically assigned.

This problem is scheduled to be fixed in a future release of the Quartus II software.