Description
Due to a problem in the Quartus® II software version 11.0 and later, you may see this internal error during Analysis & Synthesis. This error is related to the following assignments in the Quartus II Settings File (.qsf):
set_global_assignment -name HUB_ENTITY_NAME SLD_HUB
set_global_assignment -name HUB_INSTANCE_NAME SLD_HUB_INST
Resolution
To work around this problem, delete these assignments from the .qsf.
This issue is scheduled to be fixed in a future version of the Quartus II software.