Article ID: 000082282 Content Type: Error Messages Last Reviewed: 09/11/2012

Error: Illegal port connection -- port CALIBRATIONSTATUS of GXB Calibration block atom "alt2gxb:alt2gxb_component|cal_blk" cannot be connected

Environment

  • Verification
  • BUILT IN - ARTICLE INTRO SECOND COMPONENT
    Description

    The Quartus® II software versions 7.1 and earlier generate this error when you apply black box assignments to the ALTGXB or ALT2GXB entity for formal verification with Cadence LEC.

    To avoid the error, create black boxes for each MegaWizard®-generated custom megafunction variation file or wrapper file that instantiates the ALTGXB or ALT2GXB megafunction. Then recompile the design.

    This issue is scheduled to be fixed in a future version of Quartus II software.

    For more information about creating black boxes for formal verification, refer to the Cadence Encounter Conformal Support (PDF) chapter in volume 3 of the Quartus II Handbook.

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