Hi,nThanks for your response. All the tests I've done were from making a copy of the 19.0 design file and opening it in 2020R1. The only reason I input the loss data again was to verify that both versions would use the same parameters for the material I was using, but the core loss parameters were already set to the expected values in the material properties when I opened the design in 2020R1.nFor Kdc, I have tried varying the value to see if there is any effect. However, my design is fully AC and I didn't see any changes in the core loss value when I changed Kdc.nAnother note, I've tried this on multiple computers and had the same issue, so it seems like it's not related to a specific copy of the software.n