File is not eligible for processing as per the FIFO Rules

FIFO : First-In, First-Out. In FIFO method where the first received item will be sold out first. If your getting error messages like this in the website please check the other oldest items are in the queue before working on the item.

For example if you have 10 items in the inventory queue and the order the items are like 1,2.. 10 then the the first item 1 should be sold out and then only 2nd item will be sold out.. like this items are sold from 1,2... to 10..

So any error message coming like this first check the items executed order like from first inventory item is sold or not. If not sold then sold the item first and then go for the item 2..