Category in Advanced options dialog box: Import

Set this advanced option to TRUE (default) to create a new log every time you import a model.

To append a log entry to the previous log, set it to APPEND.

This advanced option is user specific and the setting is saved in options.bin under the user folder, for example, in C:\Users\<user>\AppData\Local\Trimble\Tekla Structures\<version>\UserSettings. Restart Tekla Structures to activate the new value.