You're right in that such faulty field names - if indeed there are any - can cause unforeseen problems.
Just maybe(!) doing this will at last give some clue: <$list filter="[all[tiddlers]fields[]]"> </$list> Notepad++ is a text editor, not a word processor, so you'd need a text editor. Google search <https://www.google.com/search?sxsrf=ALeKk00Cm-SbQ6Oki8EJUJSE-EDp38s22A%3A1586453899175&ei=i12PXtOtCtGLmwXvkLXwBQ&q=notepad%2B%2B+mac&oq=notepad%2B%2B&gs_lcp=CgZwc3ktYWIQARgBMgUIABCRAjICCAAyAggAMgIIADICCAAyAggAMgIIADICCAAyAggAMgIIADoECAAQR0oMCBcSCDktMTMyZzE3SgkIGBIFOS0xZzFQlChYlChgnTpoAHABeACAAXCIAXCSAQMwLjGYAQCgAQGqAQdnd3Mtd2l6&sclient=psy-ab> shows some software called TextWrangler for Mac. <:-) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/a32b8868-7048-4c48-853c-b241c69f660a%40googlegroups.com.