I have noticed that for certain Hessian calculations that I run with GAMESS(US), the IR intensities are not produced in the log file. Below I have an example input card (without the molecule $DATA group) of a Hessian calculation I ran that didn't produce the IR intensities only the vibrational frequencies (also given below).
Why is this the case and how can I resolve it?
$CONTRL SCFTYP=UHF MULT=1 NPRINT=0 COORD=UNIQUE RUNTYP=HESSIAN ICUT=12 ITOL=25 DFTTYP=BLYP MAXIT=200 QMTTOL=1E-7 ICHARG=0 ISPHER=1 $END $SYSTEM MWORDS=800 MEMDDI=800 $END $STATPT OPTTOL=1E-6 NSTEP=200 $END $FORCE METHOD=FULLNUM NVIB=2 PROJCT=.TRUE. $END $SCF DIRSCF=.TRUE. FDIFF=.FALSE. CONV=1d-7 $END $DFT JANS=2 $END $BASIS GBASIS=ACCQ $END
FREQUENCIES IN CM**-1, IR INTENSITIES IN DEBYE**2/AMU-ANGSTROM**2, REDUCED MASSES IN AMU. 1 2 3 4 5 FREQUENCY: 0.00 0.00 0.00 0.00 0.00 SYMMETRY: B2 B2 B2 B2 B2 REDUCED MASS: 1.45984 5.02837 27.97693 1.31228 1.81766
Note, that normally the output would also include the IR intensities for each frequency.