Yes Sue, one idea, but i don't think that you'll like it too much.
For now, [URL="http://www.monarchforums.com/showthread.php?t=3168"]avoid running Monarch v10.5 on Win 7 64 bit[/URL]. I'm sure that it'll get sorted out in time, but it seems a bit shaky just now.
I spotted the dreaded acronym 'pdf' in there.
You're starting with a PDF as input fole to the Project, it works except for Windows 7 using the original Project/Model. I also works with Windows but ONLY if you create a new model.
Did I get that right?
If you save the new model and re-save the project will running the project then work?
It may be that there is a mismatch of some kind in the PDF engine (there have been several versions of the pdf conversion engine as you likely know!). I'm wondering if the old model has a preset for an old version that in combination with V10/Windows 7 has some issues.
That said if you DO change the pdf translation engine version there are possibilities for the model to need re-working anyway I guess. PDFs are like that.
I could be a mile off target here but the idea has not been mentioned so far and it would be quite quick to check. My 10.5 installation defaults to PDF engine V10. I'm not sure what differences/benefits/etc. there are for the 10.5 PDF engine.