2016-08-29 13:32 GMT-06:00 Chang Woon Jang <changwoonj...@gmail.com>:
> Dear Votca Users,
>
>    I have four dihedral distributions directly from csg_boltzmann. However,
> only one dihedral distribution gives waning sign during IBI run as follows.
>
> WARNING: For the 359 non-zero entries for table 0 in table_d1.xvg the forces
> deviate on average 196% from minus the numerical derivative of the potential
That means something went wrong in the table conversion!
>
>
>
> Then, the IBI fails with Fatal error: 1 of the 1720 bonded interactions
> could not be calculated because some atoms involved moved further apart than
> the multi-body cut-off distance (2.02391 nm) or the two-body cut-off
> distance (2.02391 nm), see option -rdd, for pairs and tabulated bonds also
> see option -ddcheck
That is most likely due to the above warning.
>
>
> I am not sure why only one dihedral gives this warning and prevent IBI run.
> Do you have any comments on that?
IBI for dihedral interactions is a bit tricky and not very well
testing in VOTCA, so you will need to do a bit a debugging on your
side.

Christoph

>
> I have converted dihedral distribution radian to angle (only first column)
> due to the ibi requirement just using unit convert     x*180/3.14 (x is
> radian).
>
> Thank you.
>
> Best regards,
> Changwoon Jang,
>
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-- 
Christoph Junghans
Web: http://www.compphys.de

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