Ok, I have a web Service published on an Oracle OC4J App Server for which I can generate a web Service connector and consume via SOAP-RPC.

I then generated
Pkg: TestWS
Folder: docTypes
document: wsOutput
exchRate String
Folder: JDBC
testWS Connection
Folder: Utils
CustomJDBC “select todays_rate from exch_rate where country_Name=?”
getExchange Flow Service
pipelineIN: countryName String
pipelineOut: DocRef to wsOutput named getRateOut
:getRateOutput:results:exchRate mapped to DocRef:exchRate
(all others vars dropped in pipelineOut)
I set execute to Anonymous

I can invoke this WS from URL
[url]http://saker:7777/invoke/utils/getExchange?countryName=Canada[/url]
and get Results

getRateOut exchRate 1.181482
countryNameList Canada

If I generate WSDL and try and create a connector to it from another package I never get anything in the soap-return
The document generated for output is empty unlike my external WS which has a return document and SOAP-FAULT document

When I test the wm generated WebService I get this in my pipeline after SOAP-RPC

<?xml>
<soap-env:envelope>
<soap-env:body>
<ser-root:getratewsresponse>
</ser-root:getratewsresponse>
</soap-env:body>
</soap-env:envelope>

When Invoke my externally generated WS I get
<?xml>
<soap-env:envelope>
<soap-env:body>
<ns1:hellowsresponse>
<return>
<textout>Hello There Integration Server!</textout>
</return>
</ns1:hellowsresponse>

Here is the generated WSDL from wm.
I have been looking online and at the WebServicesDevGuide.pdf but have not found the key to my mistake.

</soap-env:body>

</soap-env:envelope>

Some followup Information,
I created my output document (wsOutput) in exactly the same format as the output from JDBC adapter server which is
Doc:getRateOutput
|
->DocList:results
|
->String:exchRate

and in the pipeline I remapped the toplevel output to this new document type.
I regenereated WSDL and just for a lark I generated a server side stub for this in another java development tool and I was given 2 classes for the document
wsOuptut which contains an array of results
which contains a string exchRate
public class wsOutput
{
private results public class results
[…]
and
public class results
{ private String m_exchRate;
[…]
But wm Would not generate an output document from that WSDL.

Okay, my bad
Or maybe not. What i needed to do , or what worked for me anyway was
on input/output tab of the Flow Service specify what my output type was to be and make sure I mapped that variable properly as the result of the Flow…

<doh!>