WSO2 Identity Server - Error "Invalid Status" at entitlementServiceClient.getDecision - wso2

Question

When using an access with userid & passsword based entitlement, and use of class "entitlementServiceClient", method "getDecision", the program always receives an error: "Invalid Status"
Is there anything missing in the usage of this class:
org.wso2.carbon.identity.entitlement.ui.client.EntitlementServiceClient;
my statements are:
//initialize authentication admin stub
UnitTest1 remoteEntitlementClient = new UnitTest1();
//login using authentication admin stub providing valid credentials
remoteEntitlementClient.login(userid, password);
//initialize entitlement service stub with obtained authentication cookie
remoteEntitlementClient.initUnitTest1();
String decision = entitlementServiceClient.getDecision(myRequest);
System.out.println("\nXACML Decision is received : " + decision);
The authorization process seems to works fine and it receives a valid login confirmation and cookie (see log below).
oc2615188332 entitlement]$ sh ./testit.sh
Jul 17, 2015 8:10:37 PM org.apache.axiom.util.stax.dialect.StAXDialectDetector detectDialect
WARNING: Unable to determine dialect of the StAX implementation at jar:file:/home/claudef/tmp/wso2/entitlement/lib/axiom_1.2.11.wso2v4.jar!/
The user admin logged in successfully.
The IdP authorization cookie is: JSESSIONID=CDEEA143EB95A5AABEB07F5A401633B4; Path=/; Secure=null; HttpOnly=null
XACML Decision is received : Invalid Status
Elapsed seconds decimal: 6.937248979
Elapsed seconds rounded: 6.937
Entitlement flow finished successfully
Thanks in advance for support and advice.
Regards,
Claude