When it comes to previewing or completing the data merge, a message pops up saying "There is at least one data placeholder that cannot be found in the data source. Make sure all of the placeholders correspond to the fields in the data source." Is anyone able to help me fix this? When trying to data merge on any other InDesign document it will work, its just this one document that is trouble. Thanks in advance.
The problem is that at least one of your placeholders does not match any value in the first row of the data file. Did you change the data file after setting up the template?