Stepchart creation failed!

invalid SM file: measure with a strange number of notes (15 notes at line 823), notes are: array(15) { [0]=> string(4) "0000" [1]=> string(4) "2003" [2]=> string(4) "0000" [3]=> string(4) "3200" [4]=> string(4) "0000" [5]=> string(4) "2300" [6]=> string(4) "0000" [7]=> string(4) "3002" [8]=> string(4) "0023" [9]=> string(4) "0230" [10]=> string(4) "2300" [11]=> string(4) "3020" [12]=> string(4) "0000" [13]=> string(4) "0230" [14]=> string(4) "0000" }