Thanks, Jeremy, but I'm still not clear on how to use this. For newbs, i.e., me, what complete line (or lines) would you add to the top of a tiddler to display an error message if a particular macro is undefined, and do nothing if it does exist?
My use case is to add this to a tiddler where I am using a non-core macro, which is defined in another tiddler, to alert me if the macro is ever deleted/uninstalled. David. On Tuesday, 26 February 2019 06:25:58 UTC+9:30, Jeremy Ruston wrote: > > Hi David > > Try: > > [[VAR_NAME]] +[is[variable]addsuffix[ is a variable]] ~[[Undefined > variable or macro 'VAR_NAME']] > > [[currentTiddler]] +[is[variable]addsuffix[ is a variable]] ~[[Undefined > variable or macro ‘currentTiddler']] > > You can try out these examples in the “filter” tab of advanced search in > the prerelease: > > https://tiddlywiki.com/prerelease/#%24%3A%2FAdvancedSearch > <https://tiddlywiki.com/prerelease/#$:/AdvancedSearch> > > Best wishes > > Jeremy. > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/615e94d7-7f98-470d-8411-0ec123666bf2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

