I had a model fully established, then suddenly it stopped plotting water level profiles. No water levels on cross-sections or on 3D plot either. Error message “Error loading output data for profile plot”. I saw one previous message on this forum mentioning this problem, and you suggested turn off computer and reboot, which I tried unsuccessfully. You thought it was usually due to instabilities, so I tried a number of the example projects. None of them work either – exactly the same problem with all of them. I tried removing HEC-RAS and reloading it. Made no difference. Any ideas?