Hi there. Apologies again for any confusion caused.
I logged into Ancestry and created a new tree based on an upload of a GEDCOM file created by RM.
I also uploaded all the media files to Ancestry.
I then added a new media file (.jpg) to a person in RM.
I then clicked on the Treeshare button in RM to confirm if there was now a recognized difference between RM and Ancestry.
It indicated there were no differences,.
I then selected the person in RM to whom the new media file had been added.
Under the General Information heading it showed that there was indeed a new media file added in RM.
I clicked on the General Info to select the additional media file.
I clicked on ACCEPT CHANGES and then watched as the media file uploaded to 100%.
As per my earlier ISSUES post, the 100% then changed to 200% and remained so.
I waited some minutes.
I then cancelled out of this "200% indication" and RM fell over with an address exception.
Just to explain - my objective is to keep my master tree on RM on my PC.
I want the copy of my tree on Ancestry to be kept up to date with RM.
I find that if I make several updates to RM, the facility to sync with Ancestry is so cumbersome that it is easier to delete the Ancestry tree and upload a new GEDCOM from RM.