The idea is that some file has a lot of sheets (with and without the charts) and new sheets should be copied from the template to the output file and the application will fill the data sheet and will modify the series definition on the chart.
Hi, InsertAndCopySheet will not indeed copy chart sheets from one workbook to another: this is because some links in the chart sheets with the original workbook which are problematic to copy.
I can't say we will be able to implement this, but I have put it in our investigation list and we will try to see if it can be added.