Problem merging tags

[Alandbush]

(25-09-2020 16:58)MarmiteSandwich Wrote:  My control points only support a limited number of displayed tags, including Comment, so I am attempting to show Contentgroup, by merging (appending) Contentgroup onto Comment, so I can see the text from both tags in one display field. I know that Contentgroup exists, because I can use it as an indexTag. I am following the rules for the Tag values property, by specifying Comment.merge={Contentgroup} in the TagValue option field. If Contentgroup is not listed in ItemTags or IndexTags, I get this error message in the log:
incorrect tag name 'Contentgroup' in option 'Comment.merge' in property 'tagOptions'. If I include it in IndexTags or ItemTags, the rescan runs without errors, but the Comment field, as displayed on Now Playing, is unchanged.

Am I missing something, or barking completely up the wrong tree?
Marmite

It may be due to your choice of tag editor and how it stores CONTENTGROUP within the audio file. See Tag mappings for tag equivalents.

You could check the MinimServer log file for the existence or creation of the CONTENTGROUP tag.
Or you could use the writeAllTags feature to list all of the tags for a file, folder or library. Refer to this section in the User guide.