Amazon has limited the number of items you are allowed to list. This limit is rating based - which means the better rating you have the more items you can list.
This limit is usually raised every 3 days and you are free to try to export again every 3 days. If you will set your store to "automatic export" our service will export again after 3 days.
However, you are able to talk with Amazon support and request them to raise your store limit of creating new ASINs.
Items on your dashboard that waiting for match with existing Amazon items are not affected from the limit and you can match items as many as you wish.
If you have any question about your account or any other matter,
Please feel free to contact us at email@example.com