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  4. OPTGEOM fail during ELASTCON

OPTGEOM fail during ELASTCON

Scheduled Pinned Locked Moved Elasticity, Piezoelectricity, Photoelasticity
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  • denkos
    denkos
    denkos
    wrote last edited by
    #1

    Hi,
    I encountered a problem with the geometry optimization failing during Elasticity calculation.
    (ERROR **** OPTGEOM **** SCF FAILED - OPTGEOM STOP). I tried to insert NOOPTGEOM Keyword to skip optimization and test input, but it still tries to optimize.
    If someone has tips I am happy to try.
    I use CRYSTAL14.

    Fe_hcp_ELAST_0.d12 ;Fe_hcp_ELAST_0.out

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    • aerba
      aerba
      aerba
      Developer
      wrote last edited by aerba
      #2

      Hi,

      The keyword PRESSURE requires the keyword PREOPTGEOM to pre-optimize the structure at the desired pressure of 15 GPa.

      It is recommended to increase the level of printing in the output with the PRINT keyword to better see what is happening.

      Please, try with the following input:

      ELASTCON
      PRINT
      PREOPTGEOM
      PRESSURE
      15
      END
      END

      and let me know what you get.

      Alessandro Erba
      Professor of Physical Chemistry
      Department of Chemistry, University of Torino
      [email protected]

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      • denkos
        denkos
        denkos
        wrote last edited by
        #3

        Hi,
        I got the new output, but it seems to have the same error code and the PRINT command did not really add new information as far as I could see.

        Fe_hcp_ELAST_0.out

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        • aerba
          aerba
          aerba
          Developer
          wrote last edited by
          #4

          Hi,

          I recommend first running a standard zero pressure optimization with:

          OPTGEOM
          FULLOPTG
          END

          Let me know what you get from this.

          Alessandro Erba
          Professor of Physical Chemistry
          Department of Chemistry, University of Torino
          [email protected]

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          0

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