https://community.appian.com/discussions/f/general/22404/interfacenterface Definition: Expression evaluation error at function a!dropdownField_20r2 [line 323]: A dropdown component [label="New Case Owner"] has an invalid value for &quot;choiceValues&quot;. Choice values cannot be null.en-USTelligent Community 12https://community.appian.com/thread/87667?ContentTypeID=1Fri, 05 Nov 2021 07:11:07 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:7ae38f04-8e93-4fb6-a56b-6a63fcd10f66Richard Michaelis<p>neelimaj is right here.<br />the choicevalues need to be&nbsp;without null. I would recommend a proper string array.</p><div style="clear:both;"></div>https://community.appian.com/thread/87666?ContentTypeID=1Fri, 05 Nov 2021 07:07:53 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:c8e816f9-3b93-493b-b7d7-6bccd714edefneelimaj2706<p>Hi Nikhila,</p> <p>I think one of the values in an array you used in Choice values is a NULL which is not accepted by dropdownField. Please check the choice values and remove nulls if there are any.</p><div style="clear:both;"></div>