If more than one user is working on a model, then you may want to lock the model when open to prevent others from simultaneously changing the file. To do this, use the File Lock Model when Open menu item and then save the model. A lock file is created in the same directory as the model. If another instance of RiverWare opens the model, the user is notified that the model file is locked and cannot be overwritten.

For more information, see Locking Models in User Interface.