The selection of temporal pattern by AEP is for when you’re running Monte Carlo. If you are doing a single run, you need to specify the index of the temporal pattern to use. By default this index is “1”, i.e. the first temporal pattern in the file. The first pattern of the rare bin would be index “21”. This index is set using the “Select patterns for deterministic runs” button. Some documentation around this is in the v6.31 release notes word document
Hope this helps!