Hi, in one of my models I use BasicFR objects as representations of some 'virtual' equipment that otherwise only exists as a resource in Process Flow, so that I can track states. I noticed that the state gantt chart no longer works for these when they are added to an MTBF/MTTR that applies only to a subset of states. The attached model demonstrates this. It contains a processor and a BasicFR whose states are changed to a random value every five seconds. A state gantt chart tracks the states of both objects. They are both a member of an MTBF/MTTR. If you run the model in this state, the chart works correctly.   Now change the MTBF to only apply to some state. The chart continues to work for the processor but the state changes of the BasicFR are no longer recognized and the state remains as "other" indefinitely in the chart.   Reverting the change to the MTBF does not fix the chart. It remains 'broken' with respect to the BasicFR even if the MTBF is deleted alltogether. Since the problem does not occur with the processor I can only guess that it might have something to do with the fact that the BasicFR uses a different state change event. But so far I didn't get any further in examining this bug. Any input or possible workaround is appreciated.   Best wishes, Felix Show More