totalsam - Nope. Wish I could figure that out too.
bkeaton - No script available. It won't hurt to leave it in. If you must be rid of it, just use phpmyadmin in cpanel. Delete the 12 tables that begin with quickbooks. Then, remove the field "quickbooks" from the orders, products, and customers tables.
bpsstore - Sure. I can help with that. qbSync stores the unique identifier (no way to view this in QB) that QB uses to identify orders, products and customers. What you are seeing is the unique identifier of something you previously exported. You deleted something from QB that qbSync expected to be there because it previously exported it. Don't do this in the future! If you delete something in Zen Cart, turn continuing sync on and it will automatically delete in QB. Otherwise, don't mess with it in QB! No good way to get you out of this mess, but here is what I'd recommend: Empty tables quickbooks_items_record, quickbooks_customers_record, and quickbooks_orders_record in phpmyadmin via cpanel. This will erase all records of products, customers, and items that were previously exported. Then, go to Admin->Configuration->Quickbooks Sync->QBS-MATCH (There should be three values here.). Turn all three of the match values to 1. Run the web connector. It will find all products, orders, and items that match names in Zen Cart. Their names must match EXACTLY or they won't find them and match them. Go to Admin->Configuration->Quickbooks Sync->Customer Name Format and Order Number Format to format the orders and customer names. Product names use model number, no way to change that, so hopefully they are the same in QB!
As for these errors:
Error:Object "1EF04-1299973726" specified in the request cannot be found.
Error:There is an invalid reference to QuickBooks Item "CWR-41509" in the SalesReceipt line. QuickBooks error message: Invalid argument. The specified record does not exist in the list.
Error:There is an invalid reference to QuickBooks Item "CWR-36885" in the SalesReceipt line. QuickBooks error message: Invalid argument. The specified record does not exist in the list.
They mean that these products don't exist in QB. They can't export an order with those products when they don't exist in QB.