I have a process flow controlled by the two smaller blocks on the right side (the larger ones are on the left are there only for a dashboard graph). The sources on them are data-time sources. I changed the source to this system recently and tested it; it worked fine. I changed the arrival quantity and times in the sources and got the error message. After closing the error message console, the model still didn't work, but the error never showed up again. The times on the sources match each other along with the start and stop times. It would be a great help if someone could help me with this!