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Business Process Automation Platform

How to Run PowerShell Scripts with the Run External Program Tool


This article provides basic gudiance to using the Run External Program tool to run PowerShell scripts.


It is recommended you create the PowerShell script in a separate file, stored locally to the BPA Platform client. You can then use task variables to determine the file path and script file to call at task run-time.

You then use the Parameters table to specify the command line syntax which calls the script as Name | Value pairs, for example:


This example is a V2 PowerShell script. At task run-time, the PowerShell program is invoked and the following command run (note that example file paths and names have been used in place of the BPA Platform variables):

-executionpolicy remotesigned -noprofile -noninteractive -sta -command "c:\scripts\"

NOTE: If using PowerShell v1.0, the –executionpolicy, remotesigned and -sta arguments will not work. Instead, run set-execution policy remotesigned first before running the command to call the script. For a detailed description of the security implications of setting the execution policy, refer to the PowerShell help (help set-executionpolicy).

If you are unsure whether you are running v1.0 or v2.0, note the copyright message when you start up a PowerShell prompt — this will say (c)2006 for v1.0 or (c)2009 for v2.0.

Article originally published 03 December 2015 — Article updated 30 July 2019