during the exporting process, did u check the resolutions box ?
if the resolutions is too high, the programme would goes "no response'.

i havnt exported to adobe pDF format before..
only did the export to AI and Adobe psd format only.

Because i was in the same situation as you... the whole notebook hang. Then i tried to use desktop , the same thing happens. Until i realized, there was a resolution box, for you to key in the resolutions figure. It was set to too high.

check again , all the boxes, figures, on the export table.
The more effects you used on the piece of work, the longer it would takes.

troublesome when we are converting it around...
i had to convert because the printer's side corel version was somewhat corrupted and they couldnt read the file.

with the resolutions set lower, i grimaced at the thoughts of the graphics quality being compromised... because i was doing big banner, measuring more than 70 inches...

didnt really see the end result though... as it was a rush job ( too much time spent on converting >_< ) but someone took a photograph and it looks okay... lucky... phew!

oh, when i say 'printing' i meant, sending them to the PRINTERS ( printing company - those who prints big banners, the final finished ready work ).

if i print it myself with my own small printing machine, i wont convert at all lo... the corel file in its maiden form are smaller file and clearer too.

but i see alot of PRINTERS company prefered AI format....

you have to check with them first, if they used corel or AI...
as i mentioned, most prefered AI.

If you can find those that accept corel, it would lessen the works for us, and the finished end result are what we wanted.

Because i realized, there was this fonts, kinda like brush script. It looks perfect on corel. But when i exported the format , the fonts breaks.
OR when i tries to convert the fonts into curves beforehand, the same thing happens also.