I'm getting this error too in case of some URLs (FM server 13 with an Advanced client, but also through webdirect). It seems to pop up and go away every now and then on this forum. See Insert From URL and JSON mysterium
wimdecorte In my case the error number is a result of a Get ( LastError ) right after the Insert from URL script step. So it is a FM error but it makes no sense since the target field is a text Global without any validation. If it's an http error it means that it is a server-side error ( List of HTTP status codes - Wikipedia, the free encyclopedia ) which is unlikely too since pasting the same URL in a fresh browser window does not result in an error.