Paul, I have had a similar error on a mandrake 2005 system, though with ps2pdf. It turned out to be a problem with graphics and the ghostscript version. After I installed mandrake rpm ghostscript-8.15-16mdk.i586.rpm instead of 8.15-22 the problem was gone.
Hope this gives you some pointers, Maarten > -----Original Message----- > From: Paul A. Rubin [mailto:[EMAIL PROTECTED] > Sent: Thursday, December 22, 2005 12:30 AM > To: lyx-users@lists.lyx.org > Subject: Beamer/pdflatex mystery > > > This one is for the LaTeX gurus in the group: > > I have 18 Beamer presentations generated the usual way > (created in LyX, > output using pdflatex). To service a student request <sigh>, > I loaded > each one into Acrobat Pro 7 and used the menu option to enable > commenting by Acrobat Reader. This leads Acrobat Pro to do arcane > things (measured by a progress bar) and then write out a > modified copy > of the file. > > On 14 files, this worked fine; on four, it aborted midway > with an error > message that Acrobat could not read the file. The message is > probably a > bit misleading, as both Acrobat Pro and Acrobat Reader displayed all > pages of each file correctly on screen. Poking around with Pro's > "preflight" tool (which I think is more or less analogous to > chklatex), > I got a message on the four recalcitrant files that the document > structure was corrupt. > > So I returned to LyX and generated those four presentations using the > straight PDF output option, rather than pdflatex. All four > files passed > visual muster, and Acrobat Pro was perfectly happy to enable > commenting > on all four. Other than considerable time wasted hunting the bug and > work-around, the only (minor) problem is that the > non-pdflatex versions > are *much* bigger than their pdflatex cousins. > > I can't find anything that differentiates the winners from the losers > here. It's not the presence of graphics (at least one of the > four had > none), it's not the presence of math insets (several of the 14 that > worked had math insets), ... > > Does anyone have any idea what pdflatex might be doing to offend the > Gods of Document Structure (particularly in a way that does not stop > Acrobat or Acrobat Reader from displaying the document correctly)? > > TIA, > Paul > >