[retiredbiker]

Originally Posted by GregTheGrate

I think I am closer to isolating cases where search does not work across all text files. If you use a search argument (using CMD-F) that is across multiple lines of source, it often does not work across all files
e.g
<p class="calibre_4">

<img src="\.\./images/line\.jpg" class="calibre_5"/>

</p>

will not search across all files in the current book I am editing.

If you change this to

<p class="calibre_4">\s+<img src="\.\./images/line\.jpg" class="calibre_5"/>\s+</p>

then the search works across all files

Because whatever is between lines may be invisible linefeeds and spaces, and different in different places in the book, I've always used that "\s+" in cases like this - just SOP.