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Concept: Thread definition

Defines a set of activities of which only one can be active at any time
A thread definition is a set of activity definitions within a segment definition, where only one activity may be active at a time.

Unless you are using splits and combines to have multiple activities running at the same time then you will only have one thread definition in your workflow.

If you wish to have multiple threads running at the same time, then you will need to use a multi-threaded segment which begins with a Split action. The Split action starts all of the threads within the segment at the same time, and they run concurrently until the Combine action at the end of the segment receives its specified number of threads.

Important: If an activity within a thread transitions to another segment, all threads within the current segment will be cancelled.

See also: Thread instance, Workflow definition, Segment definition, Activity definition