Gross/Net Error on Payroll Register report

JD Edwards 9.2 - UN6

UBE = R073012

Our business users are trying to process an annual payroll that pays out un-used benefit time. There's no regular pay in this payroll (pay code 1). Most of the employees are working fine, these employees only have one pay code involved in their payout. But the employees that have two pay codes being paid out, are the ones getting the "Gross/Net Error" message. Where can I look to get more specific information about this error to help my business team out with this problem. What would the workaround be, if this is a known problem.