To open an InCopy CS3 document in InCopy CS, you must save the document to the InCopy CS Story format (INCD), the format used by InCopy CS. Be aware that stories created using functionality specific to InCopy CS3 might be modified or omitted when you open the file in InCopy CS.
The InCopy story is now managed, and it’s available to be checked out and edited by other users in the workflow.