Payroll Error Messages

I was wondering if anyone knows how to tell if a Payroll Error message is just a warning or something that will prevent the confirm from completing. For example, the error 138 has a description of: "WARNING - Earnings of the tax set shown below went negative while allocating before-tax deductions. Examine all calculated amounts on the check. If any are incorrect, remove and process negative and/or memo earnings on a separate check." We were able to confirm this employee with this error without making changes. Is there something that states which errors can confirm without making a correction to the paylines?