230: Metadata name after ->@ not declared

You have linked to a file using a combination of arrow and squirrel ->@ which marks a metadata link. ->@ is supposed to be followed by a metadata name to which a link has been assigned in a metadata declaration. But there is no metadata declaration for the name after ->@ in your case.

Solution

Make sure the ->@ is immediately followed by a metadata name that has been declared. Also make sure that there is an arrow -> before the URI in the metadata declaration like in the following example:

@ Powell: ->/photos/bear-park/20190503-6.jpg

[i:A sloth bear scratches himself.]->@Powell

If you do not want to create a metadata link, but want to link to a file whose address starts with an @ sign, you can prepend the sign with a backslash or enclose the whole address in backticks:

% not a metadata link
[i]->\@home.jpg

% also not a metadata link
[i]->`@home.jpg`

If you did not mean to link to a file at all, you can prepend a backslash to the arrow as well: \->\@