when posting AR batches, you get an error indicating:
"Incorrect procedure. Exchange rounding account is not defined for account set xxx"
Where xxx is the name of your account set.
This is a problem that originates in OE shipment. The tax does not get added from OE order to OE shipment when the order gets shipped. As a result, the OE invoice wouldn't have Taxes. When it comes through to AR, the fact that it has a tax code but no taxes, stops the batch being posted.
To fix this error, correct the tax on the entry and post.
Unfortunately, the OE invoice cannot be changed at this point.