[ome-users] OMERO.figure: export to PDF fails

[Kai Schleicher]

Dear OME team,

first of all, I wish you a happy new year and best of success for 2018!

Coming to my question, we were contacted by a OMERO.figure user who 
noticed that the "export to pdf" function failed when too many images 
are present in the figure (A4, vertical).

To be precises, 18 images á 512x512 pixels can still be exported, while 
export fails with 19 or more images of the same dimensions, see error 
logs below

> Traceback (most recent call last):
>    File "./script", line 1875, in <module>
>      run_script()
>    File "./script", line 1861, in run_script
>      file_annotation = export_figure(conn, script_params)
>    File "./script", line 1818, in export_figure
>      return fig_export.build_figure()
>    File "./script", line 704, in build_figure
>      self.save_figure()
>    File "./script", line 1372, in save_figure
>      self.figure_canvas.save()
>    File "/home/omeronas/omeroweb/lib/python2.7/site-packages/reportlab/pdfgen/canvas.py", line 1237, in save
>      self._doc.SaveToFile(self._filename, self)
>    File "/home/omeronas/omeroweb/lib/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 211, in SaveToFile
>      raise RuntimeError("class %s instances can only be saved once" % self.__class__.__name__)
> RuntimeError: class PDFDocument instances can only be saved once

Is there maybe a limitation concerning the amount of pixels/images?

I also attached an example Blitz0.log file when running the PDF export 
from the Figure file in question.

Thank you for your help and cheers,
Kai

-- 
>>Please note my NEW PHONE NUMBERS: +41 61 207 57 31 (direct) +41 61 207 22 50 (central)<<
Kai Schleicher, PhD | Research Associate in Advanced Light Microscopy | Biozentrum, University of Basel | Klingelbergstrasse 50/70 | CH-4056 Basel |
Phone: +41 61 207 57 31 (direct) +41 61 207 22 50 (central) | kai.schleicher at unibas.ch | www.biozentrum.unibas.ch | www.microscopynetwork.unibas.ch

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