There is a potential for the RegA Mileage to be zero for a given hour indicating that the RegA signal has not moved for the entire hour. This sets up a “divide by zero” error in the calculation of the Mileage Ratio. This is an undefined solution which in turn could make the RMPCP credit undefinable. This issue does not impact the Regulation Market clearing or operation, but only the RMPCP credit calculation. PJM believes this potential undefinable solution needs to be corrected in order to properly calculate Regulation Market credits.