Re: [ccp4bb]: Truncate Resolution Error

["Eleanor J. Dodson" <ccp4@ysbl.york.ac.uk>]

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Tristan Fiedler wrote:
> 
> In running truncate for the purpose of analysing the output plots to
> detect possible twinning, the following error appears:
> 
> TRUNCATE:  *** Data beyond useful resolution limit ***
> 


 Well - it means you have a bin where the <I> is <= 0.0. Which indeed is
tantamount to having indexed your data beyons a useful resolution
limit..

 Try truncate again setting the RESO limit to something below your
current maximum.

 But there is a more serious problem to address bout how such a
situation has arisen. Could you have the wrong cell set? 

 Or do you need to set a LABI line to make sure you are reading
something? Truncate accepts default labels IMEAN SIGIMEAN  or F SIGF,
but if they are not there you need to assign them on a LABI line.


eg LABI IMEAN = xxx or F=xxx? 


> The input file (truncate) consists of the following:
> 
> #!/bin/sh
> set -e
> truncate hklin scalep212121.mtz \
>         hklout trashtrnct_212121.mtz <<EOF
> title truncated data for twin test
> truncate yes
> anomalous no
> nresidue 720
> EOF
> 
> The resultant output file lacks the desired plots.  It should be
> pointed out that a nearly identical file in SG P41212 does not show
> this problem.
> 
> Any advice is appreciated.
> 
> Thank you kindly,
> 
> Tristan Fiedler
> 
> 
> 
> --
> Tristan J. Fiedler
> Graduate Program in Biochemistry & Molecular Biology
> University of Miami Medical School
> 
> tfiedler@newssun.med.miami.edu
> 
>