Special codes and symbols in data sources, even something as simple as a comma or quotation mark, need special handling to function in InDesign’s Data Merge.
Problems with Data Merge almost always come down to something isn’t formatted properly in the Data Source. Pay close attention to this clip to prevent errors and show-stopping issues from cropping up in your VDP publications.
Excerpted from Pariah Burke’s comprehensive Pluralsight video course, InDesign CC: Data Merge & Variable Data Printing: http://abbrv.it/vidIDVDP