I've a small search utility that uses Windows Search 4.0 as the search engine. My utility queries Windows Search and retrieves the results. I've a few PDF files as well to search. I'm able to search a few of these PDFs using the my utility and some of the PDFs are never returned in the search results, although, I copy a phrase in that PDF and search. Search fails when I try from Windows Search interface as well.
As I understand, the IFilter is bundled with the Adobe Reader package from AR 8.0. So, I've not installed it separately. The strange thing some PDFs are searchable and some or not. Am not sure as what could be the issue here . Anyone else have faced this issue? Am not sure what to look for to resolve this issue?