Autoinvoice is getting errored...

Autoinvoice is getting errored out with below message

arp_etax_util.calculate_tax_int()+
ZX_API_PUB.import_document_with_tax returns failure
An unexpected error has occurred. Please contact your system administrator.

I serached in meta link but colud not find anything...
any ideas guys what could be causing this issue

Its not an AR but an e TAX

Its not an AR but an e TAX error

1. Try to create a manual invoice for the same item , customer relation and check what error msg is coming Else

2. Change the log level in system option to 9 and re run the auto invoice.