I am simply trying to load a csv file using the Data loading activity, then use the Update data activity to insert/update into one of the data schema/tables I created. In the data loading activity where it says, 'click here to change the file format' I am letting it set the values as default 'string 255' for all the 4 columns that I have to insert. I am not sure if that is the reason why I am getting the below error.

Is there a way, I could keep the default the file format and still be able to insert the file? or not.

Error message: The document types of inbound events are incompatible. Unable to perform the operation.