                C2977: 'boost::mpl::vector' : too many template arguments&#8221;? </p><p><span class="underline">Answer</span>: The first possibility is that you
                defined a transition table as, say, vector17 and have 18 entries. The second is that
                you have 17 entries and have a composite state. Under the hood, MSM adds a row for
                every event in the composite transition table. The third one is that you used a
                mpl::vector without the number of entr