Spreadsheet error when I try copy/paste DocumentModel.IsCopyCutMode is false

Hi,

I have  this workbook with 2 spreadsheets.

1. A tableview retrieving data from a Custom table.

2. A sheet with a lot of formulas to calculate some numbers. 

When I try to copy a cell or range of cell from the second sheet it gives an error saying ' DocumentModel.IsCopyCutMode is false'. This happens only in OneStream Spreadsheet window not in excel add-in.

Any idea what could be the reason and how can it be resolved?

Thanks