Comment 78 for bug 418242

Same here. Steps to reproduce:

* draw something (ellipse, rectangle, text, etc.)
* select it
* hit Ctrl+C

Result:

* pop for Postscript export
* error message:

You need to install the UniConvertor software.
For GNU/Linux: install the package python-uniconvertor.
For Windows: download it from
http://sk1project.org/modules.php?name=Products&product=uniconvertor
and install into your Inkscape's Python location

On some shapes, those two will be repeated a second time each, followed by an additional error message:

No paths where found. Please convert all objects you want to save into paths.

Installing python-uniconvertor change the error message to

UniConvertor failed:

Traceback (most recent call last):
  File "/usr/bin/uniconvertor", line 13, in <module>
    uniconv_run()
  File "/usr/lib/python2.7/dist-packages/uniconvertor/__init__.py", line 83, in uniconv_run
    from app.io import load
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/__init__.py", line 69, in <module>
    from conf.configurator import Configurator
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/conf/configurator.py", line 11, in <module>
    from app.events import connector
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/__init__.py", line 69, in <module>
    from conf.configurator import Configurator
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/conf/configurator.py", line 13, in <module>
    from sk1libs.utils.fs import gethome
ImportError: No module named sk1libs.utils.fs

This makes Inkscape virtually unusable.