Regarding GTRR, Filemaker help says, "When used with a table in an external file, this script step will open the file containing the external table and, if selected, go to the external layout you specify." However, I've had consistently uneven experiences with GTRR and external layouts.
Currently, I cannot get any of my 4 portals to go to their external layout; nothing happens. I checked this via Script Debugger and the script step is firing (see attached screen print). This happens whether or not it is fired via the button setting or OnObjectEnter. Whenever I have a GTRR going to an INTERNAL layout, it works fine. Thanks in advance for any suggestions.