jdlessley wrote:The PDF print drivers such as CutePDF Writer, PaperPort PDF and others are really converters that convert a file into a PDF document.
That's not really true. If they were really converters, they would have some knowledge of all possible source file formats, but of course, they don't. Instead, they take the information the printing application sends to the print driver and convert it to PDF format.
jdlessley wrote: I surmise that the converter does not see anything to convert since the document is already in PDF format and therefore returns a blank document.
The PDF print driver has no knowledge of the format of the source file, since the file itself is never sent to the print driver. So that theory can't possibly explain why the blank document is returned on your system.
jdlessley wrote:I have no problems printing (or converting to PDF) any other file types using the PDF printer drivers (converters). It is just with PDF documents themselves.
And yet I can print any PDF document, including the sample PLA document you attached to another post, with every PDF printer I have ever tried, including CutePDF and PDF Creator. I have not tried your "PaperPort PDF" print driver; perhaps the problem lies with that particular print driver. Have you tried a different print driver? If another print driver fails on your system, then there must be something odd about your system. There is certainly no fundamental restriction on printing PDF files using a PDF print driver -- I do it all the time.
Questions that can benefit the larger community should be asked in a public forum, not a private message.