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HHCOOL

木虫 (著名写手)

[求助] 这是个什么错误啊?怎么处理?高人快出现

PROCEDURE:
TEST
IF |_refine_ls_shift/su_max| > 0.20 issue ALERT A
   "Alert A The absolute value of parameter shift to su ratio > 0.20"
> 0.10 issue ALERT B
   "Alert B The absolute value of parameter shift to su ratio > 0.10"
> 0.05 issue ALERT C
   "Alert C The absolute value of parameter shift to su ratio > 0.05"
An elevated value for the largest parameter shift/s.u. is indicative that proper convergence of the refinement has not yet been achieved. Additional cycles of refinement are usually sufficient to achieve adequate convergence and remove this alert. In disordered or otherwise poorly behaved structures, many additional cycles may be required before a suitable level of convergence has been achieved. Any parameters that remain constantly oscillating should be detailed in the _publ_section_exptl_refinement section. You should also consider whether appropriate restraints might help to stabilise ill-defined and oscillating parameters.  
IF _refine_ls_shift/esd_max has been used issue General ALERT
   "_refine_ls_shift/esd_max is an old dataname which has been superceded by _refine_ls_shift/su_max"
You are using an "old-fashioned", but still legal data name: _refine_ls_shift/esd_max. Please update the item to match the currently preferred name of refine_ls_shift/su_max. To ease this problem for the future, it is recommended that you upgrade or modify your CIF generating software accordingly.  
IF neither _refine_ls_shift/su_max or _refine_ls_shift/esd_max has been used issue ALERT C
   "Alert C Test not performed. _refine_ls_shift/su_max is not present."
It is compulsory to report the largest parameter shift/s.u. value in the final refinement cycle under the item _refine_ls_shift/su_max. This data name is not present in your CIF or has not been assigned a value. Please insert the data item with an appropriate value.
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cluster8676

至尊木虫 (著名写手)

【答案】应助回帖

这个就是max shift太大,增加精修的轮数,但是如果你增加到几十轮都不行的话,可能要考虑做限制了。
学无止境
2楼2011-05-10 22:21:55
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HHCOOL

木虫 (著名写手)

怎么做限制啊?限制是什么意思?
3楼2011-05-11 09:00:40
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cluster8676

至尊木虫 (著名写手)

【答案】应助回帖

HHCOOL(金币+1): 2011-05-17 17:33:52
可能有些原子不稳定存在劈裂。
你精修到多少轮了?那个max shift是多少?
学无止境
4楼2011-05-11 09:43:57
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