Stepchart creation failed!

invalid SM file: measure with a strange number of notes (31 notes at line 67), notes are: array(31) { [0]=> string(4) "0000" [1]=> string(4) "0010" [2]=> string(4) "0000" [3]=> string(4) "0000" [4]=> string(4) "0000" [5]=> string(4) "0001" [6]=> string(4) "0000" [7]=> string(4) "0010" [8]=> string(4) "0000" [9]=> string(4) "1000" [10]=> string(4) "0000" [11]=> string(4) "0000" [12]=> string(4) "0000" [13]=> string(4) "0000" [14]=> string(4) "0000" [15]=> string(4) "0100" [16]=> string(4) "0000" [17]=> string(4) "0000" [18]=> string(4) "0100" [19]=> string(4) "0001" [20]=> string(4) "0000" [21]=> string(4) "0100" [22]=> string(4) "1000" [23]=> string(4) "0001" [24]=> string(4) "0000" [25]=> string(4) "0010" [26]=> string(4) "0000" [27]=> string(4) "0000" [28]=> string(4) "0000" [29]=> string(4) "0000" [30]=> string(4) "0000" }