I have a summary task, and have the 'Leveling Can Split' option set to No. The four subtasks which are in sequence, also have LCS set to No. In the Leveling options I also have 'Leveling can create splits in remaining work' unchecked. The tasks are all Priority 500. I have had to insert a factory shutdown, and I have done this by creating a Priority 1000 task which uses the resources in each of the above tasks.
I believed the logic should be that the LCS set to No on the summary task would force all four tasks to run sequentially either before or after the shutdown. But the leveler, allows two tasks to be before the shutdown, and two after, with the delay being the span of the shutdown task.
Can anyone advise on whether I am doing this wrong, or if the summary task cannot be prevented from splitting in this manner? I am at a loss, the summary task has an input field to say the task cannot be split, but there it is split in the schedule. Any suggestions in how to keep these subtasks together?