I am stuck in calculating the frequencies of one optimised geometry for naphthalene CASSCF(10,10) with Gaussian 16. I have optimised its geometry and checked the active space is the pi system of it, as I wanted. However, I have tried to run either Opt Freq and Freq alone and keeps giving me errors. Does anyone know if it is a problem of Gaussian or if it can be overcome with any Iop option.
This is the error that I am getting:
Number 0 Base 40448 End 65536 End1 65536 Wr Pntr 40448 Rd Pntr 40448 Length 25088 Int.Num 1 Operation on file out of range. FileIO: IOper= 1 IFilNo(1)= 2800 Len= 20502 IPos= 0 Q= 139934647205904 Error termination in NtrErr: NtrErr Called from FileIO.
And so it seems like it is a problem of writing. In the following drive link you have the .chk file that I am using to check, as well as my .com input file. I am also adding my output file, so the error can be traced more easily.