workflow execution can be stopped, paused and run step by step. After you run workflow the following toolbar buttons appears:

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  <img src="/wiki/download/attachments/2097183/Stopping and Pausing Workflow.jpg"/>
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With a help of these buttons you can:

Pause workflow - pause the runned workflow.

Next step in workflow - do the next step in workflow.

Process one message - do the first queue message step of the selected element in workflow. It is active if an element selected.

Stop workflow - cancel workflow process.