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  4. Problem in Restarting IR Intensities Calculation with CPHF

Problem in Restarting IR Intensities Calculation with CPHF

Scheduled Pinned Locked Moved Vibrational Spectroscopies: IR, Raman, INS
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  • xrocquefundefined Offline
    xrocquefundefined Offline
    xrocquef
    wrote on last edited by dmitoli
    #1

    I now have one more problem during the next step, which consists to restart the calculation to obtain the Raman spectrum. In my previous calculations using CPHF I was using the sequence:

    FREQCALC
    RESTART
    INTENS
    DIELTENS
    5.30029   -0.00000   -0.00000
    0.00000    5.30029   -0.00000
    0.00000   -0.00000    5.30029
    IRSPEC
    DAMPFAC
    5.0
    GAUSS
    ENDIR
    ENDFREQ
    

    and it was working perfectly, but here I have the following error message:

    RESTART FROM  AN INCOMPLETE HESSIAN MATRIX
    ERROR **** RESTHES **** RESTART DATA WAS OBTAINED WITH CPHF, USE INTCPHF
    

    Is it possible that the RESTART when using NOINTSYM in the INTCPHF block must be different? I didn't find any lines about NOINTSYM in the USERGUIDE.
    Best regards

    Xavier

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    • aerbaundefined Offline
      aerbaundefined Offline
      aerba Developer
      wrote on last edited by
      #2

      Hi,

      Indeed, to restart an INTCPHF intensity calculation, the INTCPHF keyword must be kept.

      In your case, the restart input would look something like:

      FREQCALC
      INTENS
      INTRAMAN
      INTCPHF
      ENDCPHF
      RESTART
      ENDFREQ
      

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

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      • xrocquefundefined Offline
        xrocquefundefined Offline
        xrocquef
        wrote on last edited by
        #3

        Thank you very much Jacques and Alessandro.
        Now it works :).
        Best regards
        Xavier

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