Gaps in Search Index at root of search fails


I’ve been working with “Search.Indexes”, an XML file with the following structure:

My file shows a substantial percentage of Document pairs with Title pairs but no Text pairs, even on a fresh rebuild. These are perfectly ordinary documents, as far as I can tell, with typical RTF text content. I’m noticing that documents with absent Text pairs seem to run together in groups, and that they’re not always the same docs from index to index.

Any insights as to which conditions might lead Scrivener’s index rebuilder not to generate a pair for a document or a group of documents?

Rgds – Jerome

(Earlier version erroneously posted in a Mac forum.)