I just updated to Version 6.49 and I am now experiencing this same bug. I use the Perez transposition, but sometimes the reports show Hay. When I run a simulation and print the report immediately, the Perez transposition is correctly listed. However, when I save the Variant, open the Miscellaneous tools to change the Resulting estimation from 95 to 99, the report then shows the incorrect Hay transposition. Cheers! Sam