Hello Ralf and eversone else
Thanks for your email concerning checksums.
Here is what I am seeing
I started with mymodel (model_mon19), ran one round of refinement against
newdatadmm2_unique1.mtz in phenix 1.4.3 with command line like the one below
.
Using the output pdb , I rebuilt a lot and renamed pdb to model-fri24.pdb ,
Now when I try refine using the same input mtz ..phenix complains about
rfree checksum mismatch again.
I am assuming that phenix does use the rfree from the mtz file
(newdatadmm2_unique1.mtz) and the checksum for the rfree entered in the pdb
should have come during round 1 from newdatadmm2_unique1.mtz , so I am a
little concerned that it complains.
The command lines I am using are given below: I only change the model , the
ncs definition file and the directory in which the refinement is run.
between runs.
Hari
phenix.refine newdatadmm2_unique1.mtz model-fri24.pdb
simulated_annealing=true simple_ncs_from_pdb.ncs refinement.main.ncs=true
refinement.input.xray_data.r_free_flags.generate=False --overwrite
ordered_solvent=true main.number_of_macro_cycles=10
strategy=rigid_body+group_adp+individual_sites
refinement.ncs.excessive_distance_limit=None
refinement.input.experimental_phases.labels=newdatadmm2_unique1.mtz:HLAC,HLBC,HLCC,HLDC>phenix_fri24.log
Command that wrote the checksum is same as above with model replaced with a
model that represented my initial build , untouched by phenix.
On Tue, Apr 21, 2009 at 8:38 PM, Ralf W. Grosse-Kunstleve
Most other things weere the same including the resolution cutoff used and the input mtz. But phenix tells me that the md5checksums dont match.
Sorry, that's unexpected. The cutoff doesn't matter. The checksum is computed on the input data, before the cutoff is applied. The checksum is just a safety guard to avoid accidents. If you are sure the test set has not changed, simply remove the remark with the checksum from the pdb file. Let me know if the problem happens again and I'll take a closer look. In that case I will need all the input files and the sequence of commands to reproduce the problem (including the command that wrote the pdb file with the checksum).
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