VCO REST API - POST - Connection pool shut down

Hello

I am working on an automation scenario where I need a workflow in VCO A to start another workflow in VCO B using the VCO REST Plugin (1.0.2) on VCO 5.1.1.

I have done this successfully while creating a REST Host and a REST Operation using the appropriate workflows. However for my approach this is much to static and I need to create REST operations on the fly. I have peeked at the Plugin workflows and try to do the same in my workflow.

However I am stuck with the "Connection pool shut down" error when trying to execute the actual POST request.

My approach is to store the REST Host object as a static attribute with the VCO configuration and retrieve it from there. I can run GET operations without any problems directly with the host, i.e.

restRequest = restHost.createRequest(restType, restUrl, restContent);

restResponse = restRequest.execute();

My problem is actually running a POST operation. I have prepared the content in XML format, i.e.

<execution-context  xmlns="http://www.vmware.com/vco">
     <parameters>

       <parameter name="param1" type="string">

            <string>value1</string>

       </parameter>

       <parameter name="param2" type="string">

             <string>value2</string>

       </parameter>

      </parameters>

</execution-context>

and use the content type "application/xml". Earlier in my code I run a GET request to retrieve my target workflow ID for creating a Url like this:

/workflows/98c3b8ee-9569-4940-acc1-b8fbc2e64649/executions/

This is code I am using to perform the POST while creating a REST operation when needed and deleting it afterwards.

var restOperation = new RESTOperation(System.nextUUID());

restOperation.method = restType;

restOperation.urlTemplate = restUrl;

restOperation.defaultContentType = restContentType;

restHost.addOperation(restOperation);

RESTHostManager.updateHost(restHost); 

var inputParameters = [];

var restRequest = restOperation.createRequest(inputParameters, restContent);

restRequest.contentType = restContentType;

var restResponse = restRequest.execute();

restHost.removeOperation(restOperation.id);

RESTHostManager.updateHost(restHost);

My code fails when invoking the restRequest.execute throwing: 'InternalError: Connection pool shut down'. Has somebody else tried a similar scenario or has an idea what I may be missing?

Thanks,

Bernd