https://community.appian.com/discussions/f/rules/9141/can-a-startprocess-be-used-in-an-expression-rule-which-is-called-from-a-web-apiWe&#39;ve been able to successfully start a process using a!startProcess within a Web API. We haven&#39;t successfully called a!startProcess as part of an expression rule called from a Web API. The documentation for a!startProcess does say it will only executeen-USTelligent Community 12https://community.appian.com/thread/40839?ContentTypeID=1Wed, 28 Dec 2016 16:00:38 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:d93e55e6-7144-4fa0-bf1d-e9a2d13d3f95VenuHere is one example<br />interface calls an expression rule which contains a!startprocess. expression rule able to execute a!startprocess.<br /><br /><p><a href="/cfs-filesystemfile/__key/communityserver-discussions-components-files/15/start-Process.png"><img src="/cfs-filesystemfile/__key/communityserver-discussions-components-files/15/start-Process.png" alt=" " /></a></p><div style="clear:both;"></div>https://community.appian.com/thread/40838?ContentTypeID=1Wed, 28 Dec 2016 15:44:51 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:ead0927a-b83b-4b30-b523-4346cb6d5722Venu@Carig, AFAIK we can use smart functions like a!startprocess in Web API or SaveInto of any sail component. Which means when ever user interacts with sail components the respective saveInto will be executed including smart functions if exist. As you said you are using expression rule so it doesn't need any user interactions thats why it didn't executes a!smart functions.<br /><div style="clear:both;"></div>