Previous versions must be removed.
Both versions A and B must be installed.
Version A is compatible with Etabs 18, 19, 20, and 21, and version B of Stratify is compatible with Etabs 22.
When the Column Optimizer option is selected, after analyzing the structure in the structure design stage, it sometimes gives an error connecting to Etabs. In this case, if you are using version A of Stratify, close it and use version B and vice versa.
If there is still a problem after trying both versions A and B, then close both Stratify and Etabs, then go to the installation location of the Etabs you are working with and run the RegisterETABS file in Run as administrator mode to complete the Etabs registration, and then try again.
Note that both Etabs and Stratify must be opened in Run As Administrator mode.