Preview processor problem with LibreOffice

I am getting this error twice when I start Hilary using
`node app.js | node_modules/.bin/bunyan`

```
[2013-08-12T13:46:33.521Z] ERROR: oae-modules/5870 on mersey: Error initializing module oae-preview-processor
    Error: ENOENT, unlink '/tmp/oae/113712-5870-nrsxkj/office.pdf'
```

When I tried to execute manually the command that Hilary is using to test the preview processor I get an error too.

So, when I execute:

`/usr/bin/soffice --headless --invisible --nologo --nolockcheck --convert-to pdf /home/dldft/oae/Hilary/node_modules/oae-preview-processor/lib/processors/file/office.js --outdir /tmp/oae/113712-5870-nrsxkj`

I get:

```
convert /home/dldft/oae/Hilary/node_modules/oae-preview-processor/lib/processors/file/office.js -> /tmp/oae/113712-5870-nrsxkj/office.pdf using writer_globaldocument_pdf_Export
Error: Please reverify input parameters...
```

The system is a Gentoo, and the version of Libreoffice is:
LibreOffice 4.0.4.2