DOES NOT OVERLAP SUFFICIENTLY - ERROR

[Gileadc]

Dear all,

I am trying for some time using the MRCI method for calculations of excited states. but every time I am using this method I am getting this error:
"CI VECTOR FOR STATE # DOES NOT OVERLAP SUFFICIENTLY WITH REFERENCE VECTORS"

How do I solve this issue? what is the origin of this error and how do I avoid it?

I am trying to increase the NSTATI number, but it does not work, and I do not fully understand what exactly does it do.

here is an input file example

***,K2

MEMORY,1,G    

geometry={K1;K2,K1,r}

basis=cc-pVQZ

r = 10

hf

dr=0.5

i = 1 

do r=8,20,dr

{CASSCF;

Closed,5,2,2,0,5,2,2,0;

Occ,8,3,3,2,8,3,3,2;

wf,38,1,0;state,12;

wf,38,4,0;state,12;

}

{MRCI;

wf,38,1,0;ref,4;state,8;

}

do j=1,8,1

e(8*(i-1)+j) = energy(j)

enddo

rr(i)=r

i = i + 1

enddo

{table,e

save,K2_e_MRCI_1_ref4.txt}

{table,rr

save,K2_r_MRCI_1_ref4.txt}

---

Thanks in advance for any help

Gilead