Hi, I am trying to calculate the vibrational frequencies of the excited state of a molecule following geometry optimisation and it has been running for more than a week without any frequency output so far in the output file. I see a warning

!!**.**.

!!Warning*.

!!Desired Analytical derivatives not available.

!!Finite difference job might take a long time.

!!

!!********************************************.

at the beginning of the output file and do not understand what’s wrong.

Here’s my input file.

$molecule

read

$end

$rem

JOBTYPE freq

METHOD wb97xD

BASIS 6-311G*

CIS_STATE_DERIV 1

CIS_N_ROOTS 5

CIS_SINGLETS true !False for triplet optimization

CIS_TRIPLETS false !True for triplet optimization

MEM_TOTAL 4000

MEM_STATIC 100

MAX_SCF_CYCLES 200

MAX_CIS_CYCLES 200

$end

Please help!