How to check for a HTTP header in choice using MEL

Hello

I have scenario , where i am sending a parameter in an HTTP request header to a mule HTTP inbound . Now , all the HTTP headers will be converted to inbound properties of mule .

I have a requirement where i have to search for the existence of a particular header parameter(reply-to) in the inbound properties of mule message and route accordingly.

I am using the MEL to achieve this but not working properly ... Need Help !! [image]

      <choice tracking:enable-default-events="true" doc:name="Choice">
            <when expression="# [message&# 46;inboundProperties&# 46;'reply-to'!='null']">
                <logger message=""Its a reply - to parametred call"" level="INFO" doc:name="reply-to flow "/>
            </when>
            <otherwise>
                <logger message=""its a normal call"" level="INFO" doc:name="normal flow "/>
            </otherwise>
        </choice>