I am able to select a source document (csv) from Select Source panel for Data Merge, but when I do, nothing happens. No placeholders are added to the list. I've looked at the CSV file; it's all comma delimited. I've tried doing as a tabbed text file, to no avail. All headers are present and fields are complete.
I don't receive any error messages; just no placeholder fields are loaded. Any pointers? There are 83 columns and some of the header info is quite long, if that also could be causing the jam.