In Tekla Structures 2019, the handling of temporary reference point information was changed. Starting from Tekla Structures 2019, the reference point information is cleared when you interrupt a command. If you wanted to use the reference points in Tekla Structures 2019, you had to set the reference point manually by pressing the Ctrl key and picking a point when you run a command.
Now in Tekla Structures 2019i, you can set the temporary reference point also by right-clicking when a command is running and selecting the Define temporary snap reference point option. If you use the Define temporary snap reference point command, you need to activate it for every reference point you pick.