Article ID: 000080652 Content Type: Error Messages Last Reviewed: 09/05/2018

Internal Error: Sub-system: U2B2_ROUTING, File: /quartus/db/u2b2_routing/u2b2_nd_routing.cpp, Line: 1681

Environment

  • Intel® Quartus® Prime Pro Edition
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description

    Due to a problem in the Intel® Quartus® Prime Pro Edition software version 18.1 and earlier, you may see this internal error when running the Fitter Retimer stage or the Fast Forward Timing Closure Recommendations. This error occurs when the preservation level of a design partition is changed to final before running the Fitter Retimer stage or the Fast Forward Timing Closure Recommendations.

    Beginning with version 18.1 of the Intel® Quartus® Prime Pro Edition software, this may occur when one of the following Quartus Settings File assignments is set to ON

    • FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD
    • FLOW_ENABLE_EARLY_PLACE
    • ENABLE_FORMAL_VERIFICATION
    • ENABLE_INTERMEDIATE_SNAPSHOTS
    Resolution

    To work around this problem, rerun the Fitter Retimer stage or the Fast Forward Timing Closure Recommendations and it will pass the second time. 

    This problem is scheduled to be fixed in a future release of the Intel® Quartus® Prime Pro Edition software.

    Related Products

    This article applies to 1 products

    Intel® Stratix® 10 FPGAs and SoC FPGAs

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