... little things matter

if you tried one of these error 40s (self-inflicted), this is hopefully a quick resolve for you :)

If you have a javascript webscript controller which uses JSON to communicate, remember to have 'json' in the webscript name, otherwise you do not get the 'magic' JSON object.

'testscript.post.js' (does not have a root object called 'json')
'testscript.post.json.js' (does)


You could also use the following start of the webscript (parsing the input data manually)
      // Check we have a json request
    if (typeof json === "undefined") {
        json = jsonUtils.toObject(requestbody.content);

        if (typeof json === "undefined") {

            if (logger.isWarnLoggingEnabled() == true) {
                logger.warn("Could not run webscript, because json object was undefined.");
            }

            status.setCode(501, "Could not run webscript, because json object was undefined.");
            return;
        }
    }