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longwei1221

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******************************************************
????????????????????????????????????????????????????????????????????????????????
?                                                                              ?
?     *ERROR* in PHONON calculation:  Prerequisite GEOMETRY OPTIMISATION       ?
?     has not been performed or is not converged to sufficient accuracy.       ?
?                                                                              ?
?        Maximum force |F|max     = 0.1858     eV/A                            ?
?        Parameter GEOM_FORCE_TOL = 0.5000E-01 eV/A                            ?
?                                                                              ?
?   This could be because of any of the following                              ?
?     (a) No geometry optimisation was performed                               ?
?     (b) A geometry optimisation failed to converge                           ?
?     (c) An error was made copying the optimised geometry to this .cell file  ?
?     (d) Cutoff, k-point sampling or other convergence parameter differ       ?
?         from the geometry optimisation run to this one.                      ?
?   Please check your input parameters and if necessary run or re-run a        ?
?   geometry optimisation calculation.                                         ?
?                                                                              ?
?   Alternatively increase value of GEOM_FORCE_TOL to 0.1858     or greater    ?
?   to allow this run to proceed at risk of inaccurate phonon frequencies.     ?
?                                                                              ?
?   Typically a force tolerance convergence of 0.025 eV/A is necessary to      ?
?   obtain well converged phonon frequencies althout a smaller value can be    ?
?   required in the presence of weak forces, e.g. in molecular crystals        ?
?                                                                              ?
????????????????????????????????????????????????????????????????????????????????
ERROR: Phonon run aborted because of unoptimised geometry. See BeF2_PhonDOS.castep for more details
Current trace stack:
phonon_check_geometry
phonon_calculate
castep

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1Â¥: Originally posted by longwei1221 at 2011-10-28 02:38:27:
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longwei1221

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2Â¥: Originally posted by zyj8119 at 2011-10-30 08:31:17:
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zh1987hs(½ð±Ò+8): лл 2011-11-06 09:40:01
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1Â¥: Originally posted by longwei1221 at 2011-10-28 02:38:27:
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*ERROR* in PHONON calculation:  Prerequisite GEOMETRY OPTIMISATION    has not been performed or is not converged to sufficient accuracy.  

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   This could be because of any of the following                             
      (a) No geometry optimisation was performed                        
      (b) A geometry optimisation failed to converge               
      (c) An error was made copying the optimised geometry to this .cell file
      (d) Cutoff, k-point sampling or other convergence parameter differ      
     
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   Please check your input parameters and if necessary run or re-run a    geometry optimisation calculation.               

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   Alternatively increase value of GEOM_FORCE_TOL to 0.1858  or greater   to allow this run to proceed at risk of inaccurate phonon frequencies.         
   Typically a force tolerance convergence of 0.025 eV/A is necessary to      obtain well converged phonon frequencies althout a smaller value can be    required in the presence of weak forces, e.g. in molecular crystals   

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caijj09

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zh1987hs(½ð±Ò+2): лл 2011-11-06 09:40:09
longwei1221(½ð±Ò+10): 2011-11-06 15:53:05
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longwei1221

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4Â¥: Originally posted by caijj09 at 2011-11-06 01:24:36:
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zh1987hs(½ð±Ò+3): лл 2011-11-06 22:25:14
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6Â¥: Originally posted by longwei1221 at 2011-11-06 15:56:42:
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