I am getting following fatal error while approving the purchase order.

Illegal number of args(2) for function tdpur.dll4000(tdpur.dll4000.calc.amnt.plus.vat)

Please suggest solution to resolve this issue

Regards
Rajesh

Did someone change something? Is this coding you all did? It sounds like you have a dll call for one version and a different version of the dll. If not, then I would check with Infor support to get a patch.