Stepchart creation failed!

invalid SM file: measure with a strange number of notes (15 notes at line 1994), notes are: array(15) { [0]=> string(8) "M1M1M1M1" [1]=> string(8) "00000000" [2]=> string(8) "00000000" [3]=> string(8) "00000010" [4]=> string(8) "00000000" [5]=> string(8) "00000000" [6]=> string(8) "00000000" [7]=> string(8) "00000100" [8]=> string(8) "MMMMMMMM" [9]=> string(8) "00010001" [10]=> string(8) "00100010" [11]=> string(8) "00010001" [12]=> string(8) "00100010" [13]=> string(8) "00010001" [14]=> string(8) "00100010" }