MF41 Error - No operations exist in order X

We tried to reverse a repetitive manufacturing entry via MF41 and received the error message RU008 "No operations exist in order XYZ" - As far as I know, we did not receive any errors at the time that the original confirmation was completed. We did however have to delete and reroll standard costs during the month after the original confirmation was completed. Not sure if MF30 was ran after the new standard costs were released. I'm sure that it is probably tied to the standard cost issues, but would really like to know if there is a different direction that I should be looking at?

Thanks,

Amy