If you want help you'll need to give us way more detail.
O/S? Version of ID? Definition of simple.
ok I'm using cc2015 indesign on my mac with 10.10.5. I have a simple one page b/card set up and need to import the data from a mac CSV file to make 53 cards.
However after completing the merge indesign crashes.
Please post the crash report at pastebin.com and then give us a link to view it.
There might be something in there that will help.
Fixed with a complete re-install