Re: Unable to generate PDF
Please, add a bug report to http://dev.tiki.org/Make+a+Wish
And keep in mind that PDF generation seems to be a tricky point to do it correctly for most devs (I have no clue how to fix myself, for instance).
If critical for your project, you can search a Consultant to fix it for you, etc.
Thanks, and Welcome to the Tiki community!