CCL:G: Inaccurate quadrature in CalDSu
- From: Ralf Tonner <ralf.tonner+/-googlemail.com>
- Subject: CCL:G: Inaccurate quadrature in CalDSu
- Date: Mon, 11 Aug 2008 10:40:52 +1200
Sent to CCL by: Ralf Tonner [ralf.tonner^googlemail.com]
Hi Teobald,
it sounds like your integration grid for the DFT calculation
is not fine-grained enough.
If you receive this error message in the first few SCF steps
you can use
> scf(NoVarAcc)
This prevents G03 from using looser integral-accuracy for
the first SCF steps.
If the integrals are still not accurate enough you could try
> integral(ultrafine)
For consistency reasons you should apply the same integral
accuracy to all calculations of a batch.
Hope this helps
Ralf.
--
Dr. Ralf Tonner <R.E.Tonner- -massey.ac.nz>
Centre of Theoretical Chemistry and Physics
New Zealand Institute for Advanced Study
Massey University Auckland NEW ZEALAND
Phone (64) 09 414 0800 extn 9894 Fax (64) 09 443 9779
----
Teobald Kupka teobaldk^yahoo.com schrieb:
Sent to CCL by: "Teobald Kupka" [teobaldk]=[yahoo.com]
Hi,
I am trying to calculate indirect spin-spin coupling constants in G03 using DFT
and unc-ccJ-pVXZ basis sets. Job fails with a message:
Inaccurate quadrature in CalDSu
The job is OK for RHF calculations with the same basis set or with
DFT/ccJ-pVXZ . I have tried suggested on this list guess=INDO without luck.
I would appreciate any suggestions.
Teobald Kupka
Unioversity of Opole,
Opole
teobaldk-$-yahoo.com>