This is an alternate way to write to Excel (instead of using the built in Excel.WriteToFile), found in the Bumblebee package created by Konrad Sobon. It requires the user to set up a ‘BB Data’ node, which is one of the inputs. The full list of inputs is:

FilePath

RunIt – a true / false switch, where true means ‘do it’

ByColumn – a true / false switch that essentially has the effect of Transposing the data before writing it

BB Data – a node that sets up the information to be written to Excel, and it comprehends the ‘Excel way’ of writing cell references, ie. A1, A2 etc.

More information at: http://archi-lab.net/bumblebee-dynamo-and-excel-interop/