I am unsure why vivado 2020.1 is giving errors when I try to auto assign in the address editor. I have a different project in Vivado 2019.2 using the same device(xczu5ev-sfvc784-2-I with DDR ECC SDRAM PS 4GB ) and it auto assigns. I have a VCU encode and decode with frame buffer read and writes. However, auto assign fails . I also noticed that the failing project has 43 EncData address bits in the editor while the one that auto assigns has 44.
I am not sure where and how this setting or PS configuration can be changed to get the addresses set in the editor.