I have to convert numerous files from CS4 to CC. The CS4 files are using external data from a CSV file. When I open the file in CS4 I can enable the preview and see the data from the CSV file. But when I save the file as indd or idml and try to open it in InDesignCC then I can't see the data as preview. I can see the Data fields (text).I think it's because it doesn't recognize the data fields from the CS4 file. If I delete a data field and remap it I will be able to see the preview for the field I just mapped. the other fields remain the unchanged, like they were just text.
Any help with this topic will be very appreciated. I have about 70 data fields per document and about 100 documents to go through.
Update: The symbol for a data field, ex: «fullname_2» change size when I delete and remap it. Explanation: When I open the CS4 file in IndesignCC I can't view a preview of the Data field(s) (almost positive because it's plain text). The data fields show like this «fullname_2». But when I delete that and drag a field from the data field list it shows like this <<fullname_2>>. So definitely, CC is not reading the data fields from InDesign CS4.
P.S.: The fields above («fullname_2» and <<fullname_2>> are copy and paste from Indesign CC.
Try exporting the file to .inx from CS4 (and IDML if that doesn't work, but do .inx first) and see if opening that works better.
Thanks Peter, but it didn't work.