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Sequences can have any number of local variables, which you can use to hold values you get or set in step modules. You can also use local variables for maintaining counts or holding intermediate values.
Multiple instances of a sequence can run at the same time. Often this occurs when you call a sequence recursively or when a sequence runs in multiple concurrent threads. Each instance of the sequence has its own copy of the sequence local variables. When a sequence completes, TestStand discards the values of the local variables.