CCL:G: Inaccurate quadrature in CalDSu



 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>