Dear Xinghua,
it seems that you have hit a bug: "assert violation" indicates that an internal error has occurred, i.e. some situation was hit that the program is not prepared to handle.
There must be something very special about your dataset - maybe a very small number of reflections, maybe only negative intensities, maybe something else - which triggers the bug.
Please help me fix this - send at least XDS.INP, INTEGRATE.HKL, and all *.cbf files to me, by email, or put them into a Dropbox folder and send me the link.
thank you,
Kay
On Sun, 11 Nov 2012 14:31:10 +0800, 秦兴华 <[log in to unmask]> wrote:
>Dear CCP4ers,
>
>Recently I am trying to process a dataset with XDS program, but during the intergrate and scale procedure it always ended with the following warning:
>
>
> !!! ERROR !!! ASSERT VIOLATION IN "RESTHKL"
> ******************************************************************************
> CORRECTION PARAMETERS FOR THE STANDARD ERROR OF REFLECTION INTENSITIES
> ******************************************************************************
> The variance v0(I) of the intensity I obtained from counting statistics is
> replaced by v(I)=a*(v0(I)+b*I^2). The model parameters a, b are chosen to
> minimize the discrepancies between v(I) and the variance estimated from
> sample statistics of symmetry related reflections. This model implicates
> an asymptotic limit ISa=1/SQRT(a*b) for the highest I/Sigma(I) that the
> experimental setup can produce (Diederichs (2010) Acta Cryst D66, 733-740).
> a b ISa
> 6.303E+00 3.806E-03 6.46
> !!! ERROR !!! ASSERT VIOLATION IN "RESTHKL"
>
>How would this happen? How can I get through this?
>
>Thanks in advance for your kind assistance.
>
>Best wishes
>
>Xinghua Qn
>--
>Xinghua Qin
>State Key Laboratory of Plant Physiology and biochemistry
>College of Biological Sciences
>China Agricultural University
>No.2, Yuan Ming Yuan West Road
>Haidian District, Beijing, China 100193
>Tel: +86-10-62732672
>E-mail: [log in to unmask]
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