HOW TO FIX THIS ERROR MESSAGE.
Here is how you can view your sync errors: View Sync Log
How to view error messages on the Manage Account Website:
-From the Manage Account Website, click on Reports.
-Click Sync Reports.
-Click Sync Log.
-The top section shows the syncs you have run. Click on the most recent date.
-The bottom section shows the details of the sync. Errors are in red and notices are in green, so it's easy to -scroll through and see what the errors are.
SYNC ERROR: An error occurred updating invoice S1016717. Details: There was an error when converting the quantity "1" in the field "item line quantity". QuickBooks error message: You cannot set the quantity for items of this type.
What this means is that you have an item on Invoice S1016717, you have an item that we currently don't support.
Most likely, it is a Subtotal item.
We will be supporting this in the next release, which should be available in a 2-3 weeks.
However, there are only 2 options for handing this right now.
The first is to remove the Subtotal item from this invoice.
The second is to let us know, and we will remove it from syncing to your QuickBooks.
Our experience is that this happens when you sync an invoice from your QuickBooks.
So if you let us know, we can remove this invoice from the next sync.