I am currently using wPDF 3.5.6 to create an appended pdf file by incrementally render and append the page to it (using pwAppendToInput method). The merged pdf file is created and viewed fine. However, when I try to rearrange pages around (for instance, move page 2 to page 1) using Adobe Acrobat V9, it would give an error "The document's page tree contains an invalid node."
Please advise.
Suri