Build 4.5.0.63 of xlsgen fixes an column overflow problem related to inserting a picture/chart/shape whose right anchor is on the maximum possible column of the sheet (i.e. 256 for XLS files, 16384 elsewhere). This did not lead to a corrupt Excel file, just inproper overflow handling in client code. By overflow is meant the column plus the offset shift in that column, i.e. how this is actually stored in an Excel file.