This message about tau is not really important and you can ignore it. 
Concerning convergence, mBJ always needs many more iterations.

How is the convergence? Is the charge distance :DIS in case.scf (slowly) 
decreasing or staying at the same value (or oscillating) infinitely?


________________________________
From: Wien <wien-boun...@zeus.theochem.tuwien.ac.at> on behalf of Subhasis 
Panda <onnyorup....@gmail.com>
Sent: Tuesday, December 3, 2019 10:15 AM
To: A Mailing list for WIEN2k users
Subject: [Wien] tauwrong message..

Dear wien2k users,

I have successfully calculated the bandstructure (with PBE exchange-correlation 
potential) of an inorganic lead-based perovskite material without any error and 
it is matching with the reported expt & theoretical values. When I was trying 
to calculate the same with mBJ potential, at first, scf was not converged with 
'run_lapw -i 80' command. By changing mixing scheme as PRATT and greed as 0.1, 
the convergence problem still persisted. Convergence was achieved with 
'run_lapw -i 120' command but the following tauwrong message was received.
As suggested in the previous thread, I have checked RKmax convergence and have 
found the total forces to be small (e.g up to 5).

Shall I proceed with this calculation ignoring this warning and continue 
further. If not kindly advise me to resolve this issue.

Eagerly waiting for your suggestion.
Thanks in advance.



ec cc and fc_conv 1 1 1
:CHARGE convergence:  0 0.0000 .0002004
:ENERGY convergence:  1 0.0001 .0000736250000000
>   mixer_vresp (03:55:24) 0.1u 0.0s 0:00.13 76.9% 0+0k 0+0io 0pf+0w
>   mixer       (03:55:24) 0.3u 0.0s 0:00.45 86.6% 0+0k 0+0io 0pf+0w
>   lcore       (03:55:24) 0.0u 0.0s 0:00.04 100.0% 0+0k 0+0io 0pf+0w
>   lapw2  -vresp       (03:53:23) 115.4u 5.0s 2:00.89 99.6% 0+0k 0+0io 0pf+0w
>   lapw1       (03:43:30) 580.7u 8.1s 9:52.99 99.3% 0+0k 0+0io 0pf+0w
11.0u 0.0s 0:11.16 99.2% 0+0k 0+0io 0pf+0w
  8.291231239367671E-003
  2.309413498749875E-002  1.214626201875325E-004 tauwrong=
 int:rho,tauw,grho,g2rho  1.562126838393394E-002  8.535463601811923E-003
  8.291231239367671E-003
  2.309413498749875E-002  1.214626201875325E-004 tauwrong=
 int:rho,tauw,grho,g2rho  1.562126838393394E-002  8.535463601811923E-003
  8.411458054920695E-003
  2.408336368793658E-002 -3.913379048826339E-003 tauwrong=
 int:rho,tauw,grho,g2rho  1.705490530216710E-002  8.502076033980127E-003
  8.411458054920695E-003
  2.408336368793658E-002 -3.913379048826339E-003 tauwrong=
 int:rho,tauw,grho,g2rho  1.705490530216710E-002  8.502076033980127E-003
  8.301144004402029E-003
  2.161924324812787E-002  4.550462507943014E-003 tauwrong=
 int:rho,tauw,grho,g2rho  1.399400165306191E-002  8.349857499828443E-003
  8.301144004402029E-003
  2.161924324812787E-002  4.550462507943014E-003 tauwrong=
 int:rho,tauw,grho,g2rho  1.399400165306191E-002  8.349857499828443E-003
  8.315602974638670E-003
  2.286053329538013E-002  7.350841474683453E-004 tauwrong=
 int:rho,tauw,grho,g2rho  1.543360390396875E-002  8.465358865643749E-003
  8.315602974638670E-003
  2.286053329538013E-002  7.350841474683453E-004 tauwrong=
 int:rho,tauw,grho,g2rho  1.543360390396875E-002  8.465358865643749E-003
  8.417780811168618E-003
  2.387451266699653E-002 -3.213879941289317E-003 tauwrong=
 int:rho,tauw,grho,g2rho  1.684319114510362E-002  8.460278550782173E-003
  8.417780811168618E-003
  2.387451266699653E-002 -3.213879941289317E-003 tauwrong=
>   lapw0       (03:43:19)  int:rho,tauw,grho,g2rho  1.684319114510362E-002  
> 8.460278550782173E-003
>   lapw0 -grr  (03:43:10) 8.6u 0.0s 0:08.78 98.8% 0+0k 0+0io 0pf+0w

    cycle 46    (Thu Nov 28 03:43:10 IST 2019)  (35/54 to go)

--



Best regards,
------------------------------------------------------------
Subhasis Panda
Assistant Professor
Department of Physics
National Institute of Technology Silchar
Assam, India  - 788010.

-------------------------------------------------------------
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