[support] pdftotext throws tag errors

I am using swish-e indexer to index all PDF documents. The module works fine. The problem is that one of the required binary file "pdftotext" throws errors: /path/to/files/document.pdf:287: error: Tag srccontent invalid dstport>143</commondstport> <srccontent offset="0" depth="128" ignorecase="true" ^ /path/to/files/document.pdf:287: error: Tag dstcontent invalid epth="128" ignorecase="true">LOGIN</srccontent> <dstcontent offset="0" depth="5" ^ /path/to/files/document.pdf:287: error: Tag weight invalid e">LOGIN</srccontent> <dstcontent offset="0" depth="5">* OK</dstcontent> <weight it caused my server ran out of memory few times. Have you guys seen anything like this?? Much appreciated any inputs