XS_INTELLIGENT_MESSAGES_ALLOWED
Category in Advanced options dialog: Drawing properties
Set this advanced option to TRUE to display a message
when a drawing is opened if a model object to which one or more drawing objects are
linked is deleted from the model.
If you do not want to display the message, set this advanced option to
FALSE (default).
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.