Summary: Use Windows PowerShell 4.0 to debug a workflow.
How do I set a breakpoint in a Windows PowerShell script workflow?
Add the workflow to a script and use Set-PSBreakpoint to set a line breakpoint in the workflow:
Set-PSBreakpoint -Script C:\Test-MyWorkflow1.ps1 -Line 12
ID Script Line Command Variable Action
-- ------ ---- ------- -------- ------
0 WFExample1.ps1 12