I had similar issue. My item list is approx 6000 items, updating weekly.
My solution was complex and took a long time to setup, but now works well.Now takes approx 3 minutes to update my item list.
Requires advanced knowledge of MS Access to set it up initially
Use MS Access to import list from supplierUse an Access query to create a table with correct headings etc (INCLUDING barcode) for the IIF fileExport the Access query to a text file, name the file xxxxxx.IIF, so Reckon recognises it as an IIF fileUse Reckon to import the IIF file
This is the "Headings" line of the IIF file.The first field is !INVITEM. It must start with a "!"Each heading separated by a TAB
!INVITEM NAME INVITEMTYPE PURCHASEDESC DESC ACCNT ASSETACCNT COGSACCNT PRICE COST TAXABLE TAXCODE PREFVEND AMTINCTAX PURCHTAXCODE GROSSPRICE NETPRICE BARCODE
The items are simillarThe first field is INVITEM ( without the "!" )Fields separated by a TABThis is one item from my IIF file
INVITEM Backup & storage:BATH-N5200PRO-DOM LD STOCK Thecus N5200PRO DOM Thecus N5200PRO DOM Sales Inventory Asset Cost of Goods Sold 61.00 45.00 Y GST Leader Systems Y NCG 79.00 71.82 BATH-N5200PRO-DOM
Hope that all makes sense !!