Jack,
Well, I have some good news that possibly may offer a reason for all the trees people are talking about not syncing with FTM 2017.
I successfully uploaded and Synced a 10,008 person tree exported from the master tree of 55, 272 people.
Theoretically, if I am correct, the FTM 2017 upload to Ancestry process is analyzing the data for "bloodline" linkage. When it sees data, such as the parents of a spouse, who are not in the bloodline, or another example, a person that has been entered in FTM as an "unrelated" person, Ancestry refuses to accept this data, as it does not know where to place it. It is not part of the "tree" and Ancestry is not going to create a "new unnamed" tree to account for the person.
The process key was to "Export" the bloodline tree from the master FTM tree.
Here is an interesting FTM 2017 "conflict". There are two places from which to "export" a tree. A tree may be exported from the "File" tab, "Export", and from the "Person" tab, "Export Branch" (this is the same as right clicking on the person's profile block in the tree view).
First option:
Using the "File" tab, selecting "Export", select "Continue", select "Selected individuals" button, include all items in the "Include" section, a pop-up window "Filter Individuals" appears. In this window, I selected myself, in the center select "Ancestors", in pop-up select "Include all parents", "Include all spouses" and "Include ancestor's descendants", select "Generations of ancestors to include" = 999, "Generations of descendants to include" = 15. Click apply and wait for export to finish.
This option produced a tree of 10, 008 people from a "master" tree of 55, 272 people.
The second option:
Using "Person" tab, selecting "Export Branch", in pop-up selecting myself as root of branch, in output format pop-up select all boxes (except do not select "Privatize living people- include only names" if preferred). Then "next", and wait for export.
This option produced a tree of 9,334 people from a "master" tree of 55, 272 people. I have not taken the time to analyze what is the difference between the two export functions, as they "should" be the same.
For the remaining 45,264 people in my master file, if I desire to have them sync to Ancestry, I imagine I would need to export all the individual trees from which they are composed. In my master tree, I usually added spouse parents and siblings, divorced spouses, step-children and the like.
In addition, the paternal side of my family came from Switzerland in 1833, along with 30 plus people from the same area of Switzerland, and settled in a remote (at the time) valley in central Pennsylvania. This resulted in a lot of marriages of cousins. My master tree has numerous linking lines of families where different generations have married from these original immigrants. So I have a lot of people in the tree to connect all the different cousins. I imagine this is another problem for ancestry to deal with organizing the data.
Hope this is of some assistance.
Rick Sorgen