It is hard to say without looking into example of the pdf you are referring to but it is possible that pdf contains image only and there is nothing to parse.
You may want to submit a support case and send us an example of look at the source of the pdf to see if it only contains and image.
Technical support representative
Send an email to firstname.lastname@example.org and attach the file with brief description of your issue.
You can also do a quick test like Olly suggested, open the file in a PDF reader copy the contents and past them it to Notepad. If the result comes out fine then Monarch can read it.
Rune Jherd Matas
In Acrobat Reader, can you select the text and copy it to Notepad? If you can, then there's no reason Monarch can't handle it, in which case a support ticket makes sense, as maybe you've discovered a new variety of PDF formatting that Monarch will need to learn.
If you can't select and copy the text in Acrobat Reader, then it might just be an image layer - like a fax - and Monarch won't be able to get to this. There are good tools out there - Acrobat Professional, Abbyy FineReader, Nitro PDF, Cute PDF - all of them can convert image based PDF files to text based ones, using Optical Character Recognition or OCR.
What's best will depend on the size of the job - hundreds of files, hundreds of pages in each? - and the frequency - every day, every month or a one off? and how automated it needs to be - can it be run manually by you, or does it need to be batched, or does it need to run when the lights are out from an incoming stream of PDF files?