In_Batch_Accumulation

Value	Description
On	The Data Loader accumulates earlier data in the file with data that appears later in the import file.
Off	The Data Loader overwrites earlier data in the file with data that appears later in the import file. This is the default.

The In_Batch_Accumulation option controls whether data for the same cell accumulates or overwrites other data in the load file.

If you use In_Batch_Accumulation=On combined with YTD_Data=On and you are loading several lines of data to the same schedule line, there must be 0's in the periods that do not have any activity.