Convert works fine in LibreOffice but unoconvert throws errors

[HaoSs07]

pi@pibooks: /convert/in $ unoconvert --convert-to docx /home/pi/convert/in/John\ Galsworthy\ -\ [Sfarsit\ de\ capitol]\ 01\ In\ asteptare\ #2.05.doc /home/pi/convert/out/
INFO:unoserver:Starting unoconverter.
INFO:unoserver:Opening /home/pi/convert/in/John Galsworthy - [Sfarsit de capitol] 01 In asteptare #2.0~5.doc
INFO:unoserver:Exporting to /home/pi/convert/out/
INFO:unoserver:Using MS Word 2007 XML export filter
Traceback (most recent call last):
File "/usr/local/bin/unoconvert", line 8, in
sys.exit(main())
File "/usr/local/lib/python3.9/dist-packages/unoserver/converter.py", line 247, in main
result = converter.convert(
File "/usr/local/lib/python3.9/dist-packages/unoserver/converter.py", line 201, in convert
document.storeToURL(export_path, output_props)
unoserver.converter.IOException: SfxBaseModel::impl_store file:///home/pi/convert/out failed: 0x11b(Error Area:Io Class:Abort Code:27) ./sfx2/source/doc/sfxbasemodel.cxx:3153 ./sfx2/source/doc/sfxbasemodel.cxx:1735

I'm doing something wrong ?

[regebro]

You selected a directory as the outputfile, that doesn't work, it needs to be a file.

A better error message there would be desirable.