I have created an IDF in E+ 8.9 and then updated to 8.9. Once it runs in one of my work stations it gives me the following error sequence related to the "schedule file". However when I run it in my other work station and the laptop in 8.9, it ruins and rapidly fluctuates my results and I have posted that error in a recent previouse question here,
https://unmethours.com/question/34049/imported-idf-from-e-88-to-e89-yielding-large-fluctuations-in-results/