Sounds like you're trying to make a permanent change to a temporary geocache object, one brought in via Geocaching4Locus. Right?
Try saving the object to a folder (effectively making it permanent), then modifying it. Or simply switch completely to offline caching using PQs.
Thanks for your help on this.
Yes, using G4L. My workflow is generally to use GC Offinizer to enable the cache for offline, then if it is a puzzle or multi, add a waypoint with the final coords. Once all done, I then create a track for my days caching.
I've been busy moving house for the last couple of months and just managed to start Caching again and was sure the above workflow worked before.
On recreating the scenario to write this message, I've just realised something. GC Offinizer is saying Finished, but also "Nothing to Download". Maybe this is the key and it is not getting downloaded and stored locally.
If the above is incorrect, can you advise what is the proper way for me to add a waypoint related to an existing cache, such as when I look at the GC page, I can see my related waypoint to the final coordinates?
I was sure this was the correct route, otherwise why would the waypoint tab invite me to add some waypoints?