It is not a syntax error since you could have a value in one of your searchable columns that is equal to "yiyle:mytitle". If you have a huge number of books and many Tags, Comments, and custom columns, especially Tag-Like CCs with thousands of tags or with comments CCs with large amounts of text, I could see how it could easily take a very long time to search through all of your metadata for the string "yiyle:mytitle".
Preferences > Searching > Limit the searched metadata.
Last edited by DaltonST; 03-14-2019 at 05:10 PM.
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