export excel using xml struct

[padi-dev-lucvt]

I am having a problem related to using xml to export excel. I have a chart data sheet to draw a chart. but when i use fill data into xml and zip it to get xlsx file, my chart data cells give error "the number in this cell is formatted as text or preceded by an apostrophe" and because of that My map is not drawable. Anyone have a solution? Thank you!