Duplicate doc sequence value error in call AR_INVOICE_API_PUB.create_single_invoice
I am using AR_INVOICE_API_PUB.create_single_invoice to create AR invoice but I am getting following error:
FAILURE: Errors encountered, see list below:
----------------------------------------------------
Header ID = 1
Line ID =
Sales Credit ID =
Dist Id =
Contingency ID =
Message = Duplicate document sequence value.
Invalid Value =
----------------------------------------------------
However I am using unique sequence for each transaction type. My EBS version is 12.1.3 and database version is 11.1.0.7.0
Also I have tax exemption issue. For tax exempted customers tax should not be calculated but even after providing tax exemption id tax is calculated.