Article ID: 000084580 Content Type: Troubleshooting Last Reviewed: 10/12/2011

MentorGraphics ModelSim SE 6.6d error: Fatal: Unexpected signal: 11.

Environment

  • Quartus® II Subscription Edition
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT

    Critical Issue

    Description

    During simulation of a Qsys-generated VHDL design that includes DDR2 or DDR3 external memory cores with ALTMEMPHY, the 64-bit version of Mentor Graphics ModelSim SE 6.6d may issue a fatal error similar to the following:

    #**Note: (vsim-3812) Design is being optimized... #**Fatal: Unexpected signal: 11.

    Resolution

    Use the 32-bit version of Mentor Graphics ModelSim SE 6.6d or use the -novopt option with the vsim command.

    Related Products

    This article applies to 1 products

    Arria® II FPGAs

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