# Results¶

Main results of the MCFFOptimizer are saved in the following files:

• ffield_best - force-field file corresponding to the lowest error value
• ffield_last - the most recent accepted force-filed
• MCFFOptimizer.log - summary of iterations including the error function value, number of changed and bounded force-field parameters, cumulative number of accepted and rejected steps at each step. Also the current MC parameters such as the $$\beta$$ value and the acceptance rate, are shown, as well as the elapsed time in seconds.
• fort.99 - the error function breakdown for the latest step