I am trying to Prepare & Process a handful of stock items that have been in the system for a long time. I want to sync those stock items to my BigCommerce store. I have done this 10000 times before and never had a problem. 

Usually I update the stock items price and make sure it has a page title then I go to Sync History and search the stock item by the ERP ID but now when i do that it says “The page was not displayed because the request entity is too large.” even though i search its exact name and select exact equals.

In the past if it done that, I just done the prepare mode as full for the date that I updated the stock item and then it would show up to be processed and it would sync to big commerce that way. But now nothing earlier than 2 months ago is showing to even be processed.