Update 1. As stated above, when an action has been applied and the proposed structure fails the error check stage, FUSE restarts the process to select and perform an action on a structure, which can result in the actual actions used differing significantly from the probabilities chosen in the input file. For RL-CSP and Uniform, the code has been updated such that when a proposed structure is rejected, the same action is performed again (starting from the current structure) until the action obtains a structure which passes the error check.