PHPExcel clone .xlsm with macros

I'm trying to read, clone and write and .xlsm file with PHPExcel but I get an error: Fatal error: Uncaught exception 'Exception' with message 'Worksheet!G177 -> Formula Error: An unexpected error occured' in...

Anybody know how can I read, clone and write and Excel file with macros, I mean the macros are in a template (the file that I reading) I just want to clone that file and write on it, and just keep the macros in the new file. Is that possible with PHPExcel ? is there another library to do that ?

Thanks .