I successfully perform a 6-31G calculation and use the -save command line option to save the results for re-use. The 6-31G calculation uses my GPUs. Separately, I independently perform the same calculation using a def2-TZVP basis. It also uses the GPUs.
However, when I try a BASIS2 calculation to use the 6-31G results projected as a starting guess for a def2-TZVP calculation, the calculation starts fine but never uses the GPUs.
Why is that? Is there a way to ensure the GPUs are used for a BASIS2 calculation?
Here is the BASIS2 input:
[hundreds of atoms]