Hi
I am trying to optimize a molecule with 20 atoms at CASSCF(4,4)/6-31g(d) level of theory, using Gaussian 09 software. The maximum memory that I have is: %mem= 1300MB. (Windows 10, 64bit)
The job stops with this error:
Out-of-memory error in routine OMatEl (IEnd= 134216735 MxCore= 134216728)
Use %mem=129MW to provide the minimum amount of memory required to complete this step.
Every time I increase the memory (for example to 130MW), I receive this error message again (with a little more memory requested).
Any suggestion is really appreciated.