Re: Hi, problem with building ABCL extension for MIT App Inventor

On 24/08/2017 22:24, Tomislav Tomšić wrote:

    Interpreter interpreter = Interpreter.createInstance();

Try, Interpreter.createInstance(); Interpreter interpreter = Interpreter.getInstance(); If I remember correctly, createInstance() returns null if an instance has already been created.

return lo.getStringValue();

Also, return lo.javaInstance(); may work better, unless you're sure that lo will always be a Lisp string. Vibhu