Bob von Dreele’s comments on Damping
“Damping - I never use damping in any of my refinements unless I actually need it. There is an option in the LS print menu for listing the "summary table of shift/esd" that is helpful for identifying ocsillating parameters. One should first try no damping and then use it only where necessary. Invoking it early can cause trouble. Another option for atom positions is to "limit the shift" to 0.5A or whatever to keep an early refinement from going off base.”