As the developers of Open Journal Systems, Open Conference Systems, Open Harvester Systems, and Open Monograph Press, the PKP team are experts in helping journal managers and conference organizers make the most of their online publishing projects. PKP Publishing Services offers support for:

As a customer of PKP Publishing Services, you will not only receive direct, personalized support from the PKP Development Team, but will be contributing to the ongoing development of the PKP applications. All funds raised by PKP Publishing Services go directly toward enhancing our free, open source software. For more information, please contact us.

1. Search the forum. You can do this from the Advanced Search Page or from our Google Custom Search, which will search the entire PKP site. If you are encountering an error, we especially recommend searching the forum for said error.

2. Check the FAQ to see if your question or error has already been resolved.

3. Post a question, but please, only after trying the above two solutions. If it's a workflow or usability question you should probably post to the OJS Editorial Support and Discussion subforum; if you have a development question, try the OJS Development subforum.

Check your config.inc.php to see what tools are configured -- typically something like pdf2ps or pdf2text. This will depend on your server's configuration. These tools are not part of OJS, but there should be lots of documentation online on using them.

You've verified that one PDF file is OK, but there are probably many others in your installation. I suspect one of them is corrupted; you'll have to check them all to find out which. If you're familiar with the command-line "find" command, and in particular the "-exec" parameter to it, using that will be a lot quicker than checking each with a separate command.