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Re: [abinit-forum] mr is too small


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  • From: "D. R. Hamann" <drh@bell-labs.com>
  • To: forum@abinit.org
  • Subject: Re: [abinit-forum] mr is too small
  • Date: Thu, 21 Apr 2005 12:05:25 -0400

Dear Xavier,

Please don't forget the other places the same thing occurs in the code (see attached grep result from 5.3.2).

Don Hamann

Xavier Gonze wrote:

Szieberth Denes wrote:



Hi,
I'm trying to do a ground state calculation on a polymer with a large unit cell (120 atoms, 8P,4Mo,3Cu,3I,2S,40C,60H). Shortly after starting the calculation I was rewarded with the following message in the log file:


---
ewald : BUG -
Range of real space summations
mr is too small with present value mr= 33
Since mr is hard-coded, it must be raised,
and the code must be recompiled.
Action : contact ABINIT group.
---

Well, I'm now contacting....


Dear Szieberth Denes,

Thanks for your notice... It is interesting to see that there are still
such hard-coded parameters in ABINIT . This one should not be difficult to
remove ! Well, likely for version 4.5.3 ... in a few weeks ...

Xavier




--
D. R. Hamann Phone: 908-582-4454
Director, Theoretical Materials Fax: 908-582-4702
Physics Research (retired) email: drh@physics.bell-labs.com
Bell Laboratories Lucent Technologies
700 Mountain Ave, Room 1D-371
Murray Hill, NJ 07974-0636 USA

Src_5common/ewald2.F90: integer,parameter :: mg=100,mr=33
Src_5common/ewald.F90: integer,parameter :: mg=100,mr=33
Src_6response/ewald4.F90: integer,parameter :: mg=100,mr=33
Src_7ddb/ewald9.F90: integer,parameter :: matom=200,mg=100,mr=33



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