yesterday I tried to match cases and controls with SPSS 27 and always got an error message. Before that I worked with SPSS 26 without any problems. I uninstalled, reinstalled it and tested it on another laptop. Nothing worked. The code of the error message varies depending on the number of data. For example Warnings 2.1., Warnings 2.2., Warnings 3.8.,...Does anyone habe a solution for this problem?Thanks a lot!