Hi Pietro,

I have launched two uploads with GWtoolset but it looks like the process has stopped after 5-6 records: did anyone have this problem before?

Since recently the GWToolset logs its actions in <https://commons.wikimedia.org/wiki/Special:Log/gwtoolset>. Apparently there was a 404 issue with some of your files − that may be related?
 
Hope that helps,

--
Jean-Fred