how to handle an empty enumeration value

I am trying to convert enumeration value's to Strings to send them to another Mendix application using a webservice. For the enumeration value Empty I try to set a specific value (e.g. '(empty)' ) I keep on getting the following error Caused by: com.mendix.modules.webservices.WebserviceException: Received SOAP fault, code: Client, reason: Illegal enumeration value for CheckResult ((empty))
1 answers

Why are you converting them to strings before sending them? Don't do that or don't set made up enumeration values and it should work fine. It will automatically send empty/null values in the correct way, but not if you tell it that it is a string with the word 'empty' in it.