Greetings to all.
Apparently there's been some (undocumented) changes to the iTunes API, which causes searching for an Apple collection ID to no longer return results.
This means that this feature:
is currently not working.
I've struck out this string of text in the first post for the time being, and I'll keep looking into this issue; if it sorts itself out - fine; if not I'll try to patch my script to re-enable ID search.
It has been a couple of weeks, and searching for an collection ID still returns nothing, so I will assume from now on that the change is permanent.
In retrospective, this type of search was always a fluke: searching via ID number is possible yes, but uses a different call to the API (a lookup, instead of a search). So using an ID in a keyword search was never guaranteed to yield results. To have as long as it did has been an stroke of luck.
Work is already underway into trying to add ID lookup as well as keyword search on this script, but with the time I can spare to this endeavor, a new version should not be ready by the end of this year. 
As a silver lining, ID lookup is well documented, so if/when I get it working, it should be relatively stable (hopefully 
).
As for the first post, the struck out text regarding id search will remain as such, as I consider it an important feature of my script(s), and plan to (eventually) restore this functionality.
Greetings to all;
Here is a quick patch to fix the recent change to the JSON data structure in Apple Music mode; v3.72-stable.
v371 > v372 change log:
Fixed \ Changed:
Please use the link below; I won't be updating the first post this time (for now), since the new major revision (still a WIP) will probably bring about a large review of that post.
iTunes WS#372.zip (5.1 KB)
And as always, enjoy your tagging. 