> @@ -51,8 +52,9 @@ public String evaluate(Object obj, String expression) {
>      try {
>        scriptEngine.put(getType(), obj);
>        result = String.valueOf(scriptEngine.eval(expression));
> -    } catch (Exception ex) {
> -      //Ignore
> +    } catch (Exception exception) {
> +       result = format("Unable to evaluate expression %s due to: %s. Please 
> check your shell confugration",

@nacx Suggestions for different messages welcome ;-)

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