"Unable to run test .. null object" on Business Rules service on Bluemix

Question

When testing my rules on the Business Rules service on Bluemix, I get the following error:

"Unable to run test Error when executing the ruleset /MyRuleApp/1.0/myrules/1.0

An error occurred while the rule session was called: com.ibm.rules.res.xu.internal.XUException: An error occurred during the ruleset execution. ilog.rules.engine.IlrUserRuntimeException:

null object when invoking public void myMethod()"

Answer 1

I had misconstructed the input parameter (it was missing the opening brace):

    "foo": {
        "name": "foo",
        "id": "bar"
    }
}

Once I added the opening brace I could run the test successfully.