The WebService is defined using the following MXML:
<mx:WebService id="messageService" wsdl="..........">
<Envelope class="" method="">
The service can be successfully called through a java
application, so I know it works. I created a very basic
"HelloWorld" service to test Flex, and that runs without error. I
haven't been able to find anything on this error message, and am
really lost at what the problem might be.