Geometry optimizations that won't converge


Click here for full thread
Clicked A Few Times
This is a question that isn't really specific to NWChem, since I think all codes struggle with this. I am working with a benzaldehyde dimer (28 atoms total, 14 in each molecule) that is failing to converge in the geometry optimization; it is not going wild, it is just getting to a reasonable place and then making tiny changes and never totally converging. This is a DFT run with the BLYP functional. Are there any thoughts (with this case, and in general) on how to handle these failures to converge with a geometry optimization? Thanks in advance for any advice.