ToObject(Result)

While using 

Cell_WriteRange

I pass my record list of a Structure as the docs say but  I am  still having the same error every time, I can create an excel doc but when I try to write in the document to populate it with my data I always get the same error.

DataSet: The data you want to populate in the sheet, starting at RowStart and ColumnStart intersection.
NOTE: The dataset should be passed in as an object (use the ToObject() function). The dataset should be a Record List of a Structure type. A record list of an Entity type will not work.

Any clue? thank you in advance.