ContributionsMost RecentMost LikesSolutionsHow to send custom params to "Native" methods Application: Java Swing Language: Java Tool: TestLeft 4.20 jar I have obtained a Native method of my application (say "DoCrazyStuff") which takes an argument of type CrazyData. Now, when I call this method as CrazyData cd = new CrazyData(); CrazyBean.callMethod(TestObject.class,"DoCrazyStuff", cd); I get an InvocationException with the following message com.smartbear.testleft._internal.webclient.WebApiException: Failed to parse the value '{"abc":"ABC","xyz":"XYZ","123":"345"}' of the arg1 parameter: Unable to convert JSON to an object. The JSON structure does not contain an object ID.. I know I am doing something wrong, but unable to figure it out. Any help will be appreciated.