Description
Due to a problem in the Quartus® Prime Pro edition software you may see this internal error if you connect the cal_debug Avalon® slave interface of more than one EMIF IP in the same IO column.
Resolution
This configuration is illegal.
To avoid this error do not connect more than one cal_debug Avalon slave interface in the same IO column.
This configuration is scheduled to generate a helpful error message in a future release of the Quartus Prime software.