By default, when you create a new NI-SCOPE instrument in the pin map file, the TSM 2019 and later set the group attribute to Scope so that all newly created NI-SCOPE instruments belong to the same group. TSM creates a single session for each group of NI-SCOPE instruments in the pin map file. TSM 2017 and earlier do not automatically group NI-SCOPE instruments together in pin map files. Use the Pin Map Editor to modify existing pin map files to change the value of the Group option for each instrument to assign the instrument to the same group.