RPCALC is a trial payroll calculation for one pay header. RPCALC is run from the [IPPH] screen by pressing the [Trial Pay|ACT_LAUNCH_TRIAL] button. 

The RPCALC will produce a pdf report of the payroll calculations generated for the pay. All calculations will be done as if the pay was being officially calculated by [UPCALC], however at the end of the calculation the system will 'rollback' the results, allowing the pay to be recalculated again.