By default a workflow runs without debugging settings. To use it go to the Application Settings (Settings–>Preferences) and check the following checkbox and click OK:

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  <img src="/wiki/download/attachments/3245073/Running Workflow in Debugging Mode.jpg"/>
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After that the two new buttons appears on the main toolbar:

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  <img src="/wiki/download/attachments/3245073/Running Workflow in Debugging Mode_1.jpg"/>
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