m2d.post.get_solution_data worked on V10.1 and does not on V18

[Behrad-Vic]

Hello,

I previously had a code that used the command m2d.post.get_solution_data(expressions="the variable I want",primary sweep = "Time") to retreive the results into python for further post processing in V10.1 of pyaedt it worked and now that it is updated to V18 it shows false stating that there is no expression. Can anybody tell me what was changed and how can I use this command with V18?