[Koha] Label export failed to load PDF document

[catalog at bfli.org]

I got the same message when there was a diacritic in the name I was trying to print (I was using 3.18 at the time). Maybe there is some kind of extra "unprintable" in your file of barcodes. 
      From: Caitlin Kleinpaste <kleinpastec at xenos.org>
 To: koha <koha at lists.katipo.co.nz> 
 Sent: Monday, September 28, 2015 12:08 PM
 Subject: [Koha] Label export failed to load PDF document
   
I'm using 3.20.03.000.

When I try to export barcode labels using the label creator, instead of
exporting a pdf is gives me an error saying "Failed to Load PDF Document".

I've never had this issue before and have been using the label creator for
a year.  It's only a problem for barcodes, not spine labels.  Also only
when exporting a pdf, not for xml or csv.

We create a batch using barcodes copied from a excel spreadsheet.  (We've
also copied them out of word-- the formatting doesn't make a difference.)

This particular batch has 284 barcodes.  We have tried it with fewer-- it
was ok with 2 and 10, but not with 9 or any number higher than 10.

Any ideas of what it might be or other things that we could try would be
appreciated.

Thanks,
Caitlin Kleinpaste
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