Is it possibile writing two or more Excel sheets in same transformation?

Hi,

I'm trying to write two different Excel sheets in the same file. I write first in to an Excel file (Excel Output) and then I use an Excel Writer to try to append another sheet, but I get this error:

2015/02/16 20:03:49 - Microsoft Excel Writer.0 - ERROR (version 5.2.0.0, build 1 from 2014-09-30_19-48-28 by buildguy) : Error opening new file
2015/02/16 20:03:49 - Microsoft Excel Writer.0 - ERROR (version 5.2.0.0, build 1 from 2014-09-30_19-48-28 by buildguy) : java.io.IOException: Your file contains 1631 sectors, but the initial DIFAT array at index 0 referenced block # 1953. This isn't allowed and your file is corrupt

How could I do this operation?

LuKe

Kettle - Spoon General Availability Release - 5.2.0.0
Ubuntu 14.10 64 bit
java version "1.7.0_75"
OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-1~utopic1)
OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)