I've had some random issues when shifting around big batches of SKU's. I've found that depending on how you handle the .csv file, some involuntary formatting can occur and change the #'s in your SKU. For instance, Excel can sometimes omit the first zero, or zeros of a number, or you're formatting might add ".00" to the end. One time I was batch editing some inventory, and I didn't realize that some of the formattings had changed before I uploaded back to Square... So then every single barcode that began with a zero no longer scanned. Maybe it's unrelated. I just thought that your issue could be something other than the barcode scanner itself.

I tried Shopventory before, and I don't recall having any issues with the SKU's. 

We use the Socket Mobile barcode scanners btw... I think they're great. A little expensive, but what isn't these days.

Really sorry to hear you had to manually look up your items @Yvonne2000. I can see how that slows down the checkout process and makes for a frustrating selling experience. 

You might find this thread I moved you to useful. Check out the tips @LocavoreStore posted above. If that doesn't work, our CS Team is available to walk through some troubleshooting steps. 

I have the same issue with items that I have manually entered into the system. It doesn't happen with everything. I can do a manual look up and add it to the cart. I am not understanding why this is happening when the barcode was generated by Square and item is in the library. Please help!

Hello @h2design. 

I can understand how looking up items can be time-consuming. If none of the troubleshooting steps in this thread have helped, I would suggest contacting our Customer Success Team. If you have retail, we do offer a specialized team that can assist in detail by providing more insight and maybe even walking you through some troubleshooting steps. 

Let me know if you have any other questions.