Mapping IDOC to CSV file - Missing blank field values in CSV file

Hello:

I am mapping an IDOC to a .csv file, using File Content Conversion. I specify comma as the value for the parameter 'fieldSeparator'. I get a .csv file, but blank field values are missing in the .csv file.

For example, if the .csv file format is <field1>,<field2>,<field3>

and if <field2> is blank, then the .csv file contains

<field1>,<field3>