I always get error 500 when I try to create bill invoices by batch in xero. When I send the same invoices one by one - all ok. The whole text of that exception:
xero.exceptions.XeroInternalError: {"Title":"An error occurred","Detail":"An error occurred in Xero. Check the API Status page http://status.developer.xero.com for current service status.","Status":500,"Instance":"5613754b-f382-431c-9bc9-8e3e2cdb1bd7"}
I use python with pyxero library. This problem appear only with purchase invoices. Where can the problem be?