I believe the setup for dispersion correction for CASTEP is buggy (Material Studio 2022). I am now in situation when the GUI shows the use of MBD correction, but it saves TS correction to the .param file as sedc_scheme. I am not 100% sure how I was able to set the project to this erratic state, but I believe I had activated MBD for rSCAN (by adjusting the custom dispersion correction) and than I switched the setting back to PBE functional. Now I see on the panel MBD on and PBE functional and the results is TS use. Can you check this ? It is really a bit annoying if you thing you run something (MBD) and than you find in reality TS was used …