Forum Post: AR_TransactionPaymentHistory_bus

I'm trying to create new AR_TransactionPaymentHistory_bus object. Can anyone suggest what value I should pass to nLookupTask? When I pass " AR_Invoice_UI" I'm getting NewObject: Error 90 in NewObject method .... int TaskID = (int)oSS.InvokeMethod("nLookupTask", "AR_Invoice_UI"); retVal = oSS.InvokeMethod( "nSetProgram" , TaskID); DispatchObject  opayment =  new   DispatchObject (pvx.InvokeMethod( "NewObject" ,  "AR_TransactionPaymentHistory_svc" , oSS.GetObject()));