I am modifying a model that creates a route for a selection of points, assigns a USER ID from an input box and a sequence number. I need to make a check box that asks if the user would like to solve the route. If the box is not checked, the route is not solved and only the USER ID will be populated, and the sequence number will not be assigned. I have the boolean variable set as a parameter and the model works when it is checked, but when it is unchecked the model will not run. How do I tell the model to skip the solve process and calculation of the sequence number field and move directly to calculating the user ID?