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The errors can be dealt with in a very similar approach to the above for "to spread things out", however less will be forced, so you add the whole course and components that's missing then see which one gives the fewest conflicts (ideally zero). Some courses won't add as TimeTabler can see that it's going to cause troubles during scheduling. Add it and make it your future problem... sorry about it.
Ensure that the Academic Blocks can be shown to the reps by selecting all academic blocks with the “system generated” flag, and unselect the flag. Otherwise when the DCU opens they will not appear for them.
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Ready to begin scheduling, finally!!
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